American National Standard

for Information Technology

Geographic Information Framework

Data Content Standard

(Part NNN)

Governmental Unit Boundary Data Exchange Standard

Secretariat

INFORMATION TECHNOLOGY INDUSTRY COUNCIL

Approved

MONTH/YEAR

Draft

January/2003

**American National Standards Institute**

**Forward** (This is not part of American National Standard
\[designation\])

The primary purpose of this standard is to support the exchange of
governmental unit (GU) and other legal entity boundary data. This
standard seeks to establish a common content of GU and other legal
entity boundary datasets. It seeks to decrease the costs of acquiring
and exchanging GU and other legal entity boundary data for federal,
tribal, state and local users and creators through a common means of
describing the data content. Other benefits of adopting the standard
include facilitation in maintenance of GU boundaries.

This standard has been developed to fulfill one of the objectives of the
National Spatial Data Infrastructure (NSDI), i.e., to create common
geographic base data for seven critical data themes. These core themes
are considered Framework data, of critical importance to the geographic
information infrastructure. The Geospatial One-Stop initiative, a
federal e-government initiative, is designed, in part, to expedite the
creation of the seven Framework layers.

This standard is being developed by L1, Geographic Information,
subcommittee of the InterNational Committee for Information Technology
Standards (INCITS) under the auspices of the American National Standards
Institute (ANSI). INCITS L1 standards are drafted in accordance with the
rules given in the ANSI Style manual for preparation of proposed
American National Standards.

This standard contains nine annexes, three of which are normative, six
of which are informative.

**Committee**

**Contents** **Page**

Forward i

1.0 Scope 1

2.0 Normative references 1

3.0 Definitions and abbreviations 2

3.1 Definitions 2

3.2 Abbreviations 4

4.0 Standards development 4

5.0 Overview of governmental unit and other legal entity boundary data
content 4

> 5.1
> References\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\....4
>
> 5.2 Type
> information\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\....5
>
> 5.3 Instance
> information\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\.....5

6.0 Governmental unit and other legal entity identification and
relationship information 5

6.1 Information 5

6.2 Identification 5

6.3 Relationships 5

6.3.1 Topologic relationships 5

6.3.2 Maintenance relationships 5

7.0 Data content of governmental unit and other legal entity boundaries
6

7.1 Description of a governmental unit 7

7.2 Governmental unit and other legal entity boundary dataset element
characteristics 7

8.0 Governmental unit boundary file metadata requirement 8

9.0 Maintenance authority 9

Annexes

Annex A (normative) Governmental unit boundary UML model 11

Annex B (normative) Governmental unit boundary UML object description 13

Annex C (normative) Governmental unit and other legal entity definitions
21

Annex D (informative) Governmental unit boundary encoding example 25

Annex E (informative) Use of standard with other entities 33

Annex F (informative) Governmental unit boundary file metadata
requirement 35

Annex G (informative) Diagram of governmental unit boundary description
component

characteristics 51

Annex H (informative) Table of governmental unit boundary description
component

characteristics 57

Annex I (informative) Referenced publications 63

**1.0 Scope**

The purpose of the Geographic Information Framework Data Content
Standards-Governmental Unit Boundary Exchange Standard is to establish
the content requirements for the collection and interchange of
governmental unit (GU) and other legal entity boundary data and to
facilitate the maintenance and use of that information.

This Standard identifies and defines terminology, encoding scheme, and
the data components required for describing the GU or other legal entity
and its boundary, along with the metadata needed for boundary data
exchange. This standard is applicable to all generally recognized GUs
and other legal entities, organization-recognized GUs, and other
geographic areas.

This Standard adopts the ANSI X3.31 (Federal Information Processing
Standard (FIPS) Publication 55-3) description of a GU as,

A legally bounded geographic entity that has the ability to have elected
or appointed officials and raise revenues through taxes.

In addition, the Standard accommodates other legal entities and adopts
the ANSI X3.31 (FIPS Publication 55-3) description for such entities.
Thus, this Standard defines a legal entity as,

> A geographic unit with legally defined boundaries established under
> federal, state, tribal, or local law as a governmental unit or as an
> area for the administration of some governmental function.

This standard also applies to entities that are statistically equivalent
to a legal entity for data reporting purposes, e.g. incorporated places
that are independent of counties and serve as equivalent to a county.
GUs and other legal entities recognized by this Standard are defined in
Annex E (normative). Principles described in this standard may be
extended to other geographic entities to facilitate the exchange of
boundary data, such as those listed in Annex F (informative).

The Standard specifies the content and its organization necessary for
the successful interchange of GU or other legal entity boundary data.
The Standard does not specify a particular structure for interchange of
boundary data. Further, data producers and users may structure GU or
other legal entity boundary data in any format for their internal use.

**2.0 Normative references**

The following standards contain provisions which, through reference in
this text, constitute provisions of this American National Standard. At
the time of publication, the editions indicated were valid. All
standards are subject to revision and parties to agreements based on
this American National Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards
indicated below.

\[1\] ANSI X3.31-1988, *Information Systems-Codes-Structure for the
Identification of the Counties and County Equivalents for the United
States and its Outlying and Associated Areas for Information
Interchange*

\[2\] ANSI X3.47-1988, *Information Systems-Codes-Structure and Data
Requirements for the Identification of Named Populated Places, Primary
County Divisions, and Other Locational Entities of the United States and
Its Outlying and Associated Areas for Information Interchange*

\[3\] ANSI NCITS 320-1998, *Information Technology-Spatial Data
Transfer*

\[4\] FGDC-STD-003-1999 *Cadastral Data Content Standard for the
National Spatial Data Infrastructure*

\[5\] FGDC-STD-001-1998 *Content Standards for Digital Geospatial
Metadata (Version 2.0)*

\[6\] FIPS 55-3 *Codes for Named Populated Places, primary County
Divisions, and Other Locational Entities of the United States, Puerto
Rico, and the Outlying Areas*

\[7\] FIPS 6-4 *Counties and Equivalent Entities of the United States,
Its Possessions, and Associated Areas*

\[8\] ISO 19109 *Geographic Information-Rules for Application Schema
(DIS)*

\[9\] ISO 19112 *Geographic Information-Spatial Referencing by
Geographic Identifiers (DIS)*

**3.0 Definitions and abbreviations**

**3.1 Definitions**

3.1.1 areal -- a term specifying that an object is two-dimensional

3.1.2 boundary -- line defining the limits of a geographic entity

NOTE: A boundary may or may not follow a visible feature and may or may
not be visibly marked.

In ISO 19107 boundary is \"set that represents the limits of an
entity\".

3.1.3 bounded -- the conditional relationship representing a GU or other
legal entity contained within a continuous delimiting line or an ordered
set of line segments

NOTE: Applicable at the type or instance level

In ISO 19107 bounded is \"contained within a continuous delimiting line
or an ordered set of line segments\".

3.1.4 coextensive with -- one-to-one areal maintenance relationship
between two geographic entities or features

NOTE: Applicable at the instance level

3.1.5 coincident -- a boundary shared by two or more different
geographic entity types or a boundary and a feature having the same
limits

3.1.6 contains nested -- one-to-one or one-to-many areal maintenance
relationship between a geographic entity or feature and others where
nesting relationships are inherited

NOTE: A nesting relationship implies one geographic entity must be
totally within another.

Applicable at the instance level

EXAMPLE: State of Delaware contains nested three counties.

3.1.7 contains only -- one-to-many maintenance relationship between a
geographic entity or feature and others where nesting relationships are
inherited

NOTE: A \"contains only\" nesting relationship implies two or more
geographic entities must be totally within another and exhaust all
territory within the nested entity.

EXAMPLE: State of Delaware contains only three counties.

3.1.8 composes -- the conditional relationship where the GU or other
legal entity always forms a part of another feature

NOTE: Composes assumes a geographic entity is contained entirely within,
or encompassed by, another. Applicable at the type or instance level

3.1.9 composed of -- the conditional relationship where one or more
topological or feature objects that always are the ingredients of the GU
or legal entity

NOTE: Applicable at the type or instance level

3.1.10 conjoint -- a boundary shared by two or more adjacent geographic
areas

3.1.11 contiguous -- descriptive of two areas that are adjacent to one
another, touch at a common point, or share a boundary

3.1.12 functional status -- the administrative or legal activities
associated with performing the legally prescribed functions of a
governmental unit; the administrative or legal entity is either
functioning or non-functioning, is either active or inactive

3.1.13 governmental unit -- a legally bounded geographic entity that has
the ability to have elected or appointed officials and raise revenues
through taxes

3.1.14 government unit boundary description component -- element for
identifying and storing discrete units of information on governmental
unit boundaries

3.1.15 instance -- single representation of a feature type

EXAMPLE: Corporate boundary of Augusta, Georgia

3.1.16 legal area -- a geographic area whose boundaries, name, origin,
and legal/statistical area description result from charters, laws,
treaties, or other administrative or governmental action

3.1.17 legal entity -- a geographic unit with legally defined boundaries
established under federal, state, tribal, or local law as a governmental
unit or as an area for the administration of a governmental function

3.1.18 maintenance relationship -- common areal information that must be
maintained between one or more geographic entities or features

NOTE: Applicable at the type and instance level

3.1.19 nests within -- many-to-one areal maintenance relationship
between geographic entities or features where an entity must be
contained within another entity

> NOTE: Applicable at the instance level
>
> EXAMPLE: Counties nest within states.

3.1.20 non-bounded -- the conditional relationship representing a GU or
other legal entity lacking a delimiting line

> NOTE: Non-bounded is the absence of being bounded. Applicable at the
> type or instance level

3.1.21 topological relationship -- spatial condition or characteristic
required for creating and maintaining the internal topology of a
database (or file)

3.1.22 type -- representation of a class of real world occurrences with
common characteristics

**3.2 Abbreviations**

3.2.1 ANSI -- American National Standards Institute

3.2.2 DIS -- Draft International Standard

3.2.3 FIPS PUB -- Federal Information Processing Standards Publication

3.2.4 FGDC -- Federal Geographic Data Committee

3.2.5 GU -- governmental unit

3.2.6 INCITS -- InterNational Committee for Information Technology
Standards

3.2.7 Metadata Standard -- *Content Standards for Digital Geospatial
Metadata (Version 2.0)* (FGDC-STD-001-1998)

3.2.8 NCITS -- National Committee for Information Technology Standards

3.2.9 SDTS -- *Spatial Data Transfer Standard* (FIPS-PUB-173-1992)

3.2.10 the Standard -- Governmental Unit Boundary Data Exchange Standard

**4.0 Standards development**

The FGDC Subcommittee on Cultural and Demographic Data, sponsor of the
Geographic Information Framework Data Content Standards-Governmental
Unit Boundary Exchange Standard, initiated the development of the
Governmental Unit Boundary Data Content Standard pursuant to the Office
of Management and Budget (OMB) Circular A-16 that specifies governmental
unit boundaries as one of the seven data themes that constitute the
National Spatial Data Infrastructure (NSDI). Development commenced with
the submittal of the \"Proposal for a National Spatial Data
Infrastructure Standards Project\" to the FGDC Standards Working Group
in November 1997. The proposal was accepted by the FGDC, and completed
Public Review in April 1998 with favorable comments. The first version
of the working draft was completed in February 1999. In August 2002, the
FGDC determined that the development of the suite of seven data theme
standards of the NSDI will continue under the auspices of INCITS L1.
Thus, the review and affirmation of the Governmental Unit Boundary
Exchange Standard will be through ANSI process.

**5.0 Overview of governmental unit and other legal entity boundary data
content**

The purpose of this Standard is to establish the content requirements
for the collection and interchange of governmental unit (GU) and other
legal entity boundary data. To fully describe the GU or other legal
entity boundary information, one must include references, GU type
information, GU instance information, and GU boundary instance
coordinate information.

**5.1 References**

When describing GU or other legal entity boundaries, the dataset must be
documented by FGDC-compliant metadata in accordance with
FGDC-STD-001-1998 *Content Standards for Digital Geospatial Metadata
(Version 2.0).* Annexes to this National Standard describe the necessary
reference documentation. This reference metadata requires, for example,
citation, project parameters, and data quality. In addition, one can
record other documents referenced in documenting the boundary.

**5.2 GU type information**

GU type information describes the general category, or type, of GU or
other legal entity being documented, e.g. county. This section of GU or
other legal entity documentation includes GU type name, GU definition,
coding system, if any, and relationship information to other GU type
entities.

**5.3 GU instance**

GU instance relays specific information and coordinate data about the
individual GU being described. This includes the instance name, instance
relationships, and coordinates.

**6.0 Governmental unit and other legal entity identification and
relationship information**

The exchange of GU boundary information requires that each GU be
unambiguously identified and that the relationship of that GU to other
GUs be clearly indicated.

**6.1 Information**

Information about GUs and other legal entities is presented at two
levels: the *Type Level* (pertaining to categories of GUs or other legal
entities), and the *Instance Level* (pertaining to single occurrences of
a GU or other legal entity).

**6.2 Identification**

Identification information is essential for describing GU and other
legal entity boundaries. Identification information is applicable at
both the *Type Level* and the *Instance Level*. Examples of
identification information at the type level are type name and type
definition. Examples of identification information at the instance level
are instance name and legal area description.

**6.3 Relationships**

Equally important for describing GUs and other legal entities is
knowledge of their relationships to other entities. Relationships
between GUs are topologic relationships and maintenance relationships.

**6.3.1 Topologic relationships**

Topologic relationships describe how a GU relates to its neighbors, or
how it fits within a hierarchy. Topologic relationships identified in
this standard are contiguous, composed of, composes. Topologic
relationships are applicable at the type level and instance level. They
may include relationships required for the internal topology of a
database.

**6.3.2 Maintenance relationships**

Maintenance relationships, if they exist for GUs or other legal
entities, provide the dependencies of common areal information between
one or more GUs or other legal entity boundaries and geographic area
features of which they consist. Maintenance relationships are applicable
at the Type Level and Instance Level. Maintenance relationships describe
the dependencies between one GU and another. This standard recognizes
four maintenance relationships: coextensive with, contains nested, nests
within, and contains only nested. An example of a maintenance
relationship is "Arlington County coextensive with Arlington Minor Civil
Division coextensive with Arlington Census Designated Place."
Coincidental relationships or relationships which do not require
maintenance are excluded.

The following are the recognized maintenance relationships, their
properties, and the required maintenance actions.

**6.3.2.1 Coextensive with**

A one-to-one areal maintenance relationship between two geographic
entities or features.

Properties: If A is coextensive with B, then B is coextensive with A.

> If A is coextensive with B and B is coextensive with C, then A is
> coextensive with C.

####### Maintenance: If A is coextensive with B, then any change to A results in an equal change to B.

**6.3.2.2 Contains nested**

A one-to-one or one-to-many areal maintenance relationship between a
geographic entity or feature where nesting relationships are inherited.

# Properties: If A contains nested B and C, then B nests within A and C nests within A.

Maintenance: If A contains nested B and C, then any change to A results
in an equal change to B or C or both if the change occurs at a shared
boundary.

**6.3.2.3 Nests within**

A many-to-one areal maintenance relationship between different features

Properties: If B nests within A, then A contains nested B and contains
at least one other entity of the same type feature.

Maintenance: If B nests within A, then any areal change to B along a
shared boundary segment with A results in an equal change to A.

**6.3.2.4 Contains only nested**

A one-to-many areal relationship between different objects where the
nested objects comprise the nesting object. (All entities nest within.)

Properties: If B nests within A, then A contains nested B and contains
at least one other entity of the same type feature.

Maintenance: If B nests within A, then any areal change to B adding
territory from or deleting territory to another feature that does not
nest within A, results in an equal change to A.

Note: The Contains Only Nested relationship is a more restrictive subset
of the Contains Nested relationship and implies complete coverage of the
nesting object. For example, a city may legally only exist in a single
township but not completely cover the township. Any boundary change to
the city where the city shares a boundary with the township requires a
boundary change to the township, but boundary changes to the city
internal to the township will not affect the township boundary. A change
to the township boundary only requires a change to the city boundary if
the change is along a shared boundary segment and would result in
placing a part of the city outside the township (a diminishing of the
township). A Contains Only relationship exists for all townships in a
county. Any change to the county boundary requires a change to one or
more township boundaries and any change to a township boundary along a
shared boundary segment with the county requires a change to the county
boundary. This is a simple contains nested relationship.

**7.0 Data content of governmental unit and other legal entity
boundaries**

**7.1 Description of a governmental unit**

There are many variations to the definition of a governmental unit.
Because of these variations, geographic entities recognized as GUs by
one organization may not be acknowledged as GUs by other organizations.
Section 1.0 of this National Standard contains the ANSI (FIPS)
definition of a governmental unit. The requirements to be compliant with
this standard depend upon whether or not the entity being described fits
the definition of a GU.

Annex C (normative) provides specific definitions of GUs and other legal
entities that are applicable to the Standard. The table is included in
the Standard for informational purposes to aid organizations in
identifying their GUs and other legal entities and should not be
considered an exhaustive listing of GUs and other legal entities.

Annex E (informative) provides an additional list of other entities for
which the Standard can be applied to facilitate the exchange of boundary
information.

**7.2 Governmental unit and other legal entity boundary dataset element
characteristics**

Annex A (normative) provides the data model for governmental unit data
exchange. The UML model encompasses all mandatory components used to
identify, describe, and store the information required for exchanging GU
and other legal entity boundary information. Annex B (normative)
provides all entity and attribute definitions, domains,
obligations/conditions, maximum occurrences, and data types for elements
depicted in the Governmental Unit boundary UML model.

Annex D (informative) provides examples of the information that would be
communicated when exchanging GU boundary information in accordance with
the UML data model in Annex A (normative). The examples describe the
Delaware state boundary as a curve set and the three Delaware counties
as a polygon set. FGDC compliant metadata is also provided.

Additionally, GU boundary dataset description components are depicted in
informative annexes as a graphic illustration in Annex G (informative)
and with more detail as a table in Annex H (informative). In these
annexes, the GU boundary dataset is composed of three types of
components: reference component, type information component, and
instance component. Each of the major sections contains subsections,
some of which may be further subdivided.

**7.2.1 GU boundary dataset description characteristics**

GU Boundary Description Components are defined by six characteristics:

**7.2.1.1 Component Name**

A label assigned to the GU Boundary Description Component

**7.2.1.2 Component Definition**

The GU Boundary Description Component description

**7.2.1.3 Component Domain**

Specification of the set of distinct values for each GU Boundary
Description Component

**7.2.1.4 Obligation/Condition (O/C)**

A descriptor assigned to a GU Boundary Description Component that
indicates the necessity of its inclusion in boundary information
exchange. The obligation determines whether the component shall always
be present (contain values), or be present according to established
conditions. The descriptor may have the following values:

**Mandatory (M)** The GU Boundary Description Component shall be present
in all cases, i.e., is required.

**Conditional (C)** The GU Boundary Description Component shall be
present if the condition(s) assigned to the component is met.

**Optional (O)** The GU Boundary Description Component may be present or
not. Optional GU Boundary Description Components have been defined to
provide a means to those seeking to more fully document their GU
Boundary exchange file.

**7.2.1.5 Maximum occurrences (MO)**

The number of instances a GU Boundary Description Component may have.

**7.2.1.6 Data type**

Identifies the set of distinct values for representing GU Boundary
Description Components (for example: text, integer number, real number,
or date)

######## 8.0 Governmental unit boundary file metadata requirement

The Standard is compliant with the FGDC Content Standard for Digital
Geospatial Metadata v. 2.0. The numbers preceding the metadata elements
indicate the location of the definition within the Metadata Standard.
This section is an overview of the mandatory metadata elements in the
Metadata Standard. Annex F (informative) specifies the information
necessary when documenting metadata for the Governmental Unit Boundary
Exchange Standard.

The following metadata elements are all relevant compound elements and
mandatory elements. Each element is followed by an explanatory
statement.

> 1.0 Identification information--basic information about the data set
>
> 1.1 Citation -- information to be used to reference the data set
>
> 1.2 Description -- a characterization of the data set, including its
> intended use and limitations
>
> 1.3 Time Period of Content -- time period(s) for which the data set
> corresponds to the currentness reference
>
> 1.4 Status -- the state of and maintenance of information for the data
> set
>
> 1.5 Spatial Domain -- the geographic areal domain of the data set
>
> 1.6 Keywords -- words or phrases summarizing an aspect of the data set
>
> 1.7 Access Constraints -- restrictions and legal prerequisites for
> accessing the data set. These include any access constraints applied
> to assure the protection of privacy or intellectual property, and any
> special restrictions or limitations on obtaining the data set.
>
> 1.8 Use Constraints -- restrictions and prerequisites for using the
> data set after access is granted. These include any use constraints
> applied to assure the protection of privacy or intellectual property,
> and any special restrictions or limitations on using the data set.
>
> 2.0 Data Quality Information -- a general assessment of the quality of
> the data set
>
> 4.0 Spatial Reference Information -- the description of the reference
> frame for, and the means to encode, coordinates in the data set
>
> 5.0 Entity and Attribute Information -- details about the information
> content of the data set, including the entity types, their attributes,
> and the domains from which attribute values may be assigned.
>
> 6.0 Distribution Information -- information about the distributor of
> and options for obtaining the data set
>
> 7.0 Metadata Reference Information -- information on the currentness
> of the metadata information, and the responsible party
>
> 7.1 Metadata Date -- the date that the metadata were created or last
> updated
>
> 7.4 Metadata Contact -- the party responsible for the metadata
> information
>
> 7.5 Metadata Standard Name -- the name of the metadata standard used
> to document the data set
>
> 7.6 Metadata Standard Version -- identification of the version of the
> metadata standard used to document the data set

**9.0 Maintenance authority**

The U.S. Department of Commerce, Census Bureau, Geography Division,
maintains the Geographic Information Framework Data Content
Standard-Governmental Unit Boundary Data Exchange Standard. Address any
questions to Chief, Geography Division, U.S. Bureau of the Census.

**Annex A**

**(normative)**

**Governmental unit boundary UML model**

Annex A (normative) provides the data model for data exchange. The
information required for exchanging GU and other legal entity boundary
data is described in the following abstract object model in Unified
Modeling Language (UML). Annex B (normative) provides the definitions,
domains, obligation/condition, maximum occurrence, and data type for
each object and attribute depicted in the GU Boundary Information UML.
This model is a tool to aid in understanding the elements necessary for
boundary data exchange.

![](media/image1.wmf)

**Annex B**

**(normative)**

**Governmental unit boundary UML object description**

Annex B (normative) describes the object and attribute information
necessary to exchange GU and other legal entity boundary data. This
table provides reference information about the objects and attributes in
Annex A (normative). Definitions for the terminology describing the
characteristics of the data are provided in 7.2.

To implement Annex B, one shall follow the UML diagram in Annex A and
use the following table as a reference for these objects and attributes.
Follow the Line numbers in sequence and consult the Obligation/Condition
(O/C) to determine if the component is mandatory (M), conditional (C)
and its conditions are met, or if it is optional (O). Once it is
determined that the component is required for GU boundary documentation
through its definition and obligation/condition, one shall refer to the
domain which describes the valid values that can be assigned to the data
element. If the component is a compound element, the domain will specify
the lines of data elements to include. If the component is a compound
element, the line will be blue, the domain will specify the appropriate
lines for the component, and the data type will specify \'compound\'.
For data elements the characteristic \"data type\" describes the kind of
value to be provided, e.g. integer, real, text. The maximum occurrence
(MO) will specify if the element shall only be recorded one time (1) or
if the element is repeatable from one to many times (\*).

  ------------------------- --------------------------------- ----------------------- ---------------- -------- ------------------------- -----------------------
  **B.1 GU_Dataset**                                                                                                                      

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  1                         GU_Dataset                        Set of GU type,         M                1        Class                     Lines 1-4
                                                              instance, and boundary                                                      
                                                              information to be                                                           
                                                              exchanged.                                                                  

  2                         RN GU_DatasetDescription          Association between     M                1        Association               GU_DatasetDescription
                                                              GU_Dataset and                                                              
                                                              GU_DatasetDescription                                                       

  3                         RN GU_LineSet                      Association between    C/ if the        0..\*    Association               GU_LineSet
                                                              GU_Dataset and          boundary                                            
                                                              GU_LineSet              consists of a                                       
                                                                                      set of curves                                       

  4                         RN GU_PolygonSet                   Association between    C/ if the        0..\*    Association               GU_PolygonSet
                                                              GU_Dataset and          boundary                                            
                                                              GU_PolygonSet           consists of a                                       
                                                                                      set of polygons                                     

                                                                                                                                          

  **B.1.1                                                                                                                                 
  GU_DatasetDescription**                                                                                                                 

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  5                         GU_DatasetDescription             Description of the      M                1        Class                     Lines 5-7
                                                              dataset                                                                     

  6                         Name                              Identification of the   M                1        CharacterString           Free text
                                                              dataset                                                                     

  7                         Citation                          Description of the      M                1        CharacterString           Free text
                                                              purpose and content of                                                      
                                                              the dataset.                                                                

                                                                                                                                          

  **B.1.2 GU_LineSet**                                                                                                                    

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  8                         GU_LineSet                        Set of curves that      C/if the         1        Class                     Lines 8-9
                                                              define the GU boundary  boundary                                            
                                                              being described         consists of one                                     
                                                                                      or more curves                                      

  9                         RN GU_Curve                       Association between     M                1..\*    Association               GU_Curve
                                                              GU_LineSet and GU_Curve                                                     

                                                                                                                                          

  **B.1.2.1 GU_Curve**                                                                                                                    

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  10                        GU_Curve                          Set of coordinates with C/if the         1..\*    Class                     Lines 10-26
                                                              no repetition that      boundary                                            
                                                              define a curve          consists of one                                     
                                                                                      or more curves                                      

  11                        RN GM_Curve                       Defined in ISO 19107    M                0..1     Association               GM_Curve

  12                        GM_Curve(segment\[1..\*\]:        Defined in ISO 19107    M                1                                   
                            GM_CurveSegment):GM_Curve                                                                                     

  13                        GM_OrientableCurve                Defined in ISO 19107    M                0..\*     Class                     Lines 13-14

  14                        boundary ():GM_CurveBoundary      Defined in ISO 19107    M                1                                   

  15                        RN GU_GovernmentalUnit             Association between    M                1..\*    Association               GU_GovernmentalUnit
                                                              GU_Curve and                                                                
                                                              GU_GovernmentalUnit                                                         

  16                        TP_Edge                           Defined in ISO 19107    M                1..\*                               

  17                        startPoint                        First point of a curve  M                1        Integer                   Free number

  18                        endPoint                          Last point of a curve   M                1        Integer                   Free number

  19                        intermediatePoint                 Point on a curve        C / if one or    1..\*    Integer                   Free number
                                                                                      more                                                
                                                                                      intermediate                                        
                                                                                      points exist                                        

  20                        guInstanceName                    Identification of the   M                1        CharacterString           Free Text
                                                              single representation                                                       
                                                              of the feature type, or                                                     
                                                              specific GU described                                                       

  21                        guTypeNameReference               Reference to the GU     M                1        CharacterString           Free text
                                                              type name                                                                   

  22                        guCurveSegmentID                  Specific identifier     M                1..\*    CharacterString/Integer    Free text, free number
                                                              assigned to the GU                                                          
                                                              boundary polygon                                                            

  23                        guInstanceCode                    Specific code which     C/if an instance 0..1     CharacterString/Integer    Free text, free number
                                                              identifies the GU       code exists                                         
                                                              instance being                                                              
                                                              described                                                                   

  24                        guCodingSystemReference           GU Type Code reference  C/if a type code 0..1     CharacterString/Integer   Free text
                                                                                      exists                                              

  25                        guLegalAreaDescription            Description of the      C/ if legal area 0..1     CharacterString           Free text
                                                              legal area, a           description is                                      
                                                              geographic area whose   known                                               
                                                              boundaries, name,                                                           
                                                              origin, and                                                                 
                                                              legal/statistical area                                                      
                                                              description result from                                                     
                                                              charters, laws,                                                             
                                                              treaties, or other                                                          
                                                              administrative or                                                           
                                                              governmental action                                                         

  26                        guFunctionalStatus                Administrative or legal C/ if functional 0..1     CharacterString           nonfunctioning, active,
                                                              activities associated   status is known                                     inactive
                                                              with performing the                                                         
                                                              legally prescribed                                                          
                                                              functions of a                                                              
                                                              governmental unit                                                           

                                                                                                                                          

  **B.1.2.1.1                                                                                                                             
  GM_LineSegment**                                                                                                                        

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  27                        GM_LineSegment                    Defined in ISO 19107    M                1        Class                     Lines 27-28

  28                        controlPoint:GM_Point Array       Defined in ISO 19107    M                1                                   

                                                                                                                                          

  **B.1.2.1.2                                                                                                                             
  GM_CompositeCurve**                                                                                                                     

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  29                        GM_CompositeCurve                 Defined in Defined in   M                1        Class                     Lines 29-30
                                                              ISO 19107                                                                   

  30                        RN GM_Ring                        Association between     M                1        Association               GM_Ring
                                                              GM_CompositeCurve and                                                       
                                                              GM_Ring                                                                     

                                                                                                                                          

  **B.1.2.1.2.1 GM_Ring**                                                                                                                 

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  31                        GM_Ring                           Defined in ISO 19107    M                1         Class                    Lines 31-34

  32                        RN GM_SurfaceBoundary             interior, exterior      M                1        Association               GM_SurfaceBoundary

  33                        { isSimple () = TRUE}             Defined in ISO 19107    M                1        Note                       

  34                        {Sequence}                        Defined in ISO 19107    M                1        Note                       

                                                                                                                                          

  **B.1.2.1.2.1.1                                                                                                                          
  GM_SurfaceBoundary**                                                                                                                    

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  35                        GM_SurfaceBoundary                Defined in ISO 19107    M                1        Class                     Line 35

                                                                                                                                          

  **B.1.2.1.3                                                                                                                             
  GU_BoundaryClassifier**                                                                                                                 

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  36                        GU_BoundaryClassifier             A term or phrase which  C/ if one or     0..\*    CharacterString           Free text
                                                              describes the status of more boundary                                       
                                                              the boundary.           classifiers                                         
                                                                                      exist                                               

  **B.1.2.1.4                                                                                                                             
  GU_GovernmentalUnit**                                                                                                                   

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  37                        GU_GovernmentalUnit               The GU being            M                1..\*    Class                     Lines 37-49
                                                              documented.                                                                 

  38                        guTypeName                        The designated name for M                1        CharacterString           Annex C, free text
                                                              the type of GU whose                                                        
                                                              data are being                                                              
                                                              described                                                                   

  39                        guTypeNameAbbreviation            The abbreviated name    C/ if an         1        CharacterString           Free text
                                                              for the type of GU      abbreviation                                        
                                                              whose data are being    exists for GU                                       
                                                              described               Type Name                                           

  40                        guTypeDefinition                  Definition of the type  C/ if type       1        CharacterString           Annex C, free text
                                                              of GU whose data are    definition is                                       
                                                              being described         known                                               

  41                        guTypeCode                        The specific code which C/ if a type     0..\*    CharacterString/ Integer  Free number
                                                              identifies the GU being code exists                                         
                                                              described                                                                   

  42                        guCodingSystemReference           GU Type Code reference  M                0..\*    CharacterString/ Integer  FIPS code, free text,
                                                              documentation                                                               free number

  43                        guMaintenanceRelationshipList     List of maintenance     C/ if one or     0..\*    CharacterString           Free text
                                                              relationships, common   more maintenance                                    
                                                              areal information       relationships                                       
                                                              between one or more GUs exist                                               
                                                              or legal entities and                                                       
                                                              geographic area                                                             
                                                              features, for the GU                                                        
                                                              type being described                                                        

  44                        guContiguousRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that are either more contiguous                                     
                                                              adjacent to one         relationships                                       
                                                              another, touch at a     exist                                               
                                                              common point, or share                                                      
                                                              a boundary                                                                  

  45                        guComposedOfRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that constitute more composed of                                    
                                                              the GU being documented relationships                                       
                                                                                      exist                                               

  46                        guComposesRelationshipList        List of GUs of which    C/if one or more 0..\*    CharacterString           Free text
                                                              the GU being documented composes                                            
                                                              always forms a part     relationships                                       
                                                                                      exist                                               

  47                        guContiguousRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that are either more contiguous                                     
                                                              adjacent to one         relationships                                       
                                                              another, touch at a     exist                                               
                                                              common point, or share                                                      
                                                              a boundary                                                                  

  48                        guComposedOfRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that constitute more composed of                                    
                                                              the GU being documented relationships                                       
                                                                                      exist                                               

  49                        guComposesRelationshipList        List of GUs of which    C/ if one or     0..\*    CharacterString           Free text
                                                              the GU being documented more composes                                       
                                                              always forms a part     relationships                                       
                                                                                      exist                                               

                                                                                                                                          

  **B.1.3 GU_PolygonSet**                                                                                                                  

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  50                        GU_PolygonSet                     Set of one or more      C/ if the        1        Class                     Lines 50-51
                                                              polygons that define a  boundary                                            
                                                              GU boundary being       consists of one                                     
                                                              described.              or more polygons                                    

  51                        RN GU_Polygon                     Association between     M                1        Association               GU_Polygon
                                                              GU_PolygonSet and                                                           
                                                              GU_Polygon                                                                  

                                                                                                                                          

  **B.1.3.1 GU_Polygon**                                                                                                                  

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  52                        GU_Polygon                        Set of line segments    C/ if the        1..\*    Class                     Lines 52-67
                                                              that define a GU        boundary                                            
                                                              boundary being          consists of one                                     
                                                              described.              or more polygons                                    

  53                        RN GM_Polygon                     Defined in ISO 19107    M                1        Association               GM_Polygon

  54                        TP_Face                           Defined in ISO 19107    M                1                                   

  55                        boundary:GM_SurfaceBoundary       Defined in ISO 19107    M                1                                   

  56                        spanningSurface(0,1):GM_Surface   Defined in ISO 19107    M                1                                   

  57                        RN GU_GovernmentalUnit            Association between     M                0..1     Association               GU_GovernmentalUnit
                                                              GU_polygon and                                                              
                                                              GU_GovernmentalUnit                                                         

  58                        startPoint                        First point of a curve  M                1        Integer                   Free number

  59                        endPoint                          Last point of a curve   M                1        Integer                   Free number

  60                        intermediatePoint                 Point on a curve        C / if one or    1..\*    Integer                   Free number
                                                                                      more                                                
                                                                                      intermediate                                        
                                                                                      points exist                                        

  61                        guInstanceName                    Identification of the   M                1        CharacterString           Free text
                                                              single representation                                                       
                                                              of the feature type, or                                                     
                                                              specific GU described                                                       

  62                        guTypeNameReference               Reference to the GU     M                1        CharacterString           Free text
                                                              type name                                                                   

  63                        guPolygonID                       Specific identifier     M                1..\*    CharacterString/Integer   Free text/free number
                                                              assigned to the GU                                                          
                                                              boundary polygon                                                            

                                                                                                                                           

  64                        guInstanceCode                    Specific code which     C/ if an         0..1     CharacterString/Integer   Free text/free number
                                                              identifies the GU       instance code                                       
                                                              instance being          exists                                              
                                                              described                                                                   

  65                        guCodingSystemReference           GU Type Code reference  M                0..1     CharacterString/Integer   Free text

  66                        guLegalAreaDescription            Description of the      C/if legal area  0..1     CharacterString           Free text
                                                              legal area, a           description is                                      
                                                              geographic area whose   known                                               
                                                              boundaries, name,                                                           
                                                              origin, and                                                                 
                                                              legal/statistical area                                                      
                                                              description result from                                                     
                                                              charters, laws,                                                             
                                                              treaties, or other                                                          
                                                              administrative or                                                           
                                                              governmental action                                                         

  67                        guFunctionalStatus                Administrative or legal C/ if functional 0..1     CharacterString           nonfunctioning, active,
                                                              activities associated   status is known                                     inactive
                                                              with performing the                                                         
                                                              legally prescribed                                                          
                                                              functions of a                                                              
                                                              governmental unit                                                           

                                                                                                                                          

  **B.1.3.1.1                                                                                                                             
  GU_BoundaryClassifier**                                                                                                                 

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  68                        GU_BoundaryClassifier             A term or phrase which  C/ if one or     0..\*    CharacterString           Free text
                                                              describes the status of more boundary                                       
                                                              the boundary.           classifiers                                         
                                                                                      exist                                               

                                                                                                                                          

  **B.1.3.1.2 GM_Polygon**                                                                                                                

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  69                        GM_Polygon                        Defined in ISO 19107    M                1                                  Lines 69-71

  70                        Surface Boundary                  Defined in ISO 19107    M                1                                   

  71                        Surface                           Defined in ISO 19107    M                1                                   

                                                                                                                                          

  **B.1.3.1.3                                                                                                                             
  GU_GovernmentalUnit**                                                                                                                   

  **Line \#**               **Name**                          **Definition**          **Obligation**   **MO**   **Data Type**             **Domain**

  72                        GU_GovernmentalUnit               The GU being            M                1..\*    Class                     Lines 72-84
                                                              documented.                                                                 

  73                        guTypeName                        The designated name for M                1        CharacterString           Annex C, free text
                                                              the type of GU whose                                                        
                                                              data are being                                                              
                                                              described                                                                   

  74                        guTypeNameAbbreviation            The abbreviated name    C/ if an         1        CharacterString           Free text
                                                              for the type of GU      abbreviation                                        
                                                              whose data are being    exists for GU                                       
                                                              described               Type Name                                           

  75                        guTypeDefinition                  Definition of the type  C/ if type       1        CharacterString           Annex C, free text
                                                              of GU whose data are    definition is                                       
                                                              being described         known                                               

  76                        guTypeCode                        The specific code which C/ if a type     0..\*    CharacterString/ Integer  Free number
                                                              identifies the GU being code exists                                         
                                                              described                                                                   

  77                        guCodingSystemReference           GU Type Code reference  M                0..\*    CharacterString/ Integer  FIPS code, free text,
                                                              documentation                                                               free number

  78                        guMaintenanceRelationshipList     List of maintenance     C/ if one or     0..\*    CharacterString           Free text
                                                              relationships, common   more maintenance                                    
                                                              areal information       relationships                                       
                                                              between one or more GUs exist                                               
                                                              or legal entities and                                                       
                                                              geographic area                                                             
                                                              features, for the GU                                                        
                                                              type being described                                                        

  79                        guContiguousRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that are either more contiguous                                     
                                                              adjacent to one         relationships                                       
                                                              another, touch at a     exist                                               
                                                              common point, or share                                                      
                                                              a boundary                                                                  

  80                        guComposedOfRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that constitute more composed of                                    
                                                              the GU being documented relationships                                       
                                                                                      exist                                               

  81                        guComposesRelationshipList        List of GUs of which    C/if one or more 0..\*    CharacterString           Free text
                                                              the GU being documented composes                                            
                                                              always forms a part     relationships                                       
                                                                                      exist                                               

  82                        guContiguousRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that are either more contiguous                                     
                                                              adjacent to one         relationships                                       
                                                              another, touch at a     exist                                               
                                                              common point, or share                                                      
                                                              a boundary                                                                  

  83                        guComposedOfRelationshipList      List of GUs or feature  C/ if one or     0..\*    CharacterString           Free text
                                                              objects that constitute more composed of                                    
                                                              the GU being documented relationships                                       
                                                                                      exist                                               

  84                        guComposesRelationshipList        List of GUs of which    C/ if one or     0..\*    CharacterString           Free text
                                                              the GU being documented more composes                                       
                                                              always forms a part     relationships                                       
                                                                                      exist                                               
  ------------------------- --------------------------------- ----------------------- ---------------- -------- ------------------------- -----------------------

**\
Annex C**

**(normative)**

**Governmental unit and other legal entity definitions**

###### 

Annex C (normative) provides definitions of legal GUs and other legal
areas that are generally recognized.

C.1 Alaska Native Regional Corporation (ANRC)

Corporate entity established to conduct both business and nonprofit
affairs of Alaska Native pursuant to the Alaska Native Claims Settlement
Act of 1972 (Public Law 92-203). Twelve ANRCs are geographic entities
that cover most of the state of Alaska (the Annette Islands Reserve--an
American Indian reservation--is excluded from any ANRC). (A thirteenth
ANRC represents Alaska Natives who do not live in Alaska and do not
identify with any of the 12 corporations).

Entity type: Legal

C.2 Alaska Native Village

Alaska Native Village is defined in section 3 of Public Law 92-203 to
mean any tribe, band, clan, group, village, community, or association in
Alaska listed in section 11 and 16 in this Act, or which meets the
requirements of this Act, and which the Secretary *of the Interior*
determines was, on the 1970 census enumeration date (as shown by the
census or other evidence satisfactory to the Secretary, who shall make
findings of fact in each instance), composed of twenty-five or more
Natives.

Entity type: Legal

C.3 American Indian Reservation

Federal American Indian reservations are areas that have been set aside
by the United States for the use of tribes. The exterior boundaries of
which are more particularly defined in the final tribal treaties,
agreements, executive orders, federal statutes, secretarial orders, or
judicial determinations. These entities are known as colonies,
communities, pueblos, rancherias, ranches, reservations, reserves,
villages, Indian communities, and Indian villages. The Bureau of Indian
Affairs maintains a list of federally recognized tribal governments.
Some state governments have established reservations for tribes
recognized by the state.

Entity Type: GU

C.4 American Indian Tribal Subdivision

American Indian Tribal Subdivisions are administrative subdivisions of
federally recognized American Indian reservations, off-reservation trust
lands, or Oklahoma tribal statistical areas (OTSAs), known as areas,
chapters, communities, or districts. These entities are internal units
of self-government or administration that serve social, cultural, and/or
economic purposes for the American Indians on the reservations,
off-reservation trust lands or OTSAs.

Entity Type: Legal

C.5 American Indian Trust Land

Trust lands are areas for which the United States holds title in trust
for the benefit of a tribe (tribal trust land) or for an individual
Indian (individual trust land.) Trust lands can be alienated or
encumbered only by the owner with the approval of the Secretary of the
Interior or his/her authorized representative. Trust lands may be
located on or off of a reservation.

Entity Type: GU (either alone or in combination with an associated
American Indian Reservation)

C.6 Borough

Boroughs are legally established geographic entities in Alaska, minor
civil divisions in each of the five counties that comprise New York
city, and a type of incorporated place in Connecticut, New Jersey, and
Pennsylvania.

Entity Type: Legal

C.7 City

A type of incorporated place in 49 States and the District of Columbia

Entity Type: GU

C.8 Congressional district

Congressional districts (CDs) are the 435 areas from which people are
elected to the U.S. House of Representatives. After the apportionment of
congressional seats among the states, based on census population counts,
each state is responsible for establishing CDs for the purpose of
electing representatives. Each CD is to be as equal in population to all
other CDs in the state as practical.

Entity Type: Legal

C.9 Consolidated City

A consolidated government is a unit of local government for which the
functions of an incorporated place and its county or minor civil
division (MCD) have merged. The legal aspects of this action may result
in both the primary incorporated place and the county or MCD continuing
to exist as legal entities, even though the county or MCD performs few
or no governmental functions and has few or no elected officials. Where
this occurs, and where one or more other incorporated places in the
county or MCD continue to function as separate governments, even though
they have been included in the consolidated government, the primary
incorporated place is referred to as a consolidated city.

Entity Type: GU

C.10 County or equivalent legal entity

The primary legal divisions of most states are termed "counties." In
Louisiana, these divisions are known as parishes. In Alaska, which has
no counties, the statistically equivalent entities are census areas,
city and boroughs (as in Juneau City and Borough), a municipality
(Anchorage), and organized boroughs. In four states (Maryland, Missouri,
Nevada, and Virginia), there are one or more incorporated places that
are independent of any county organization and thus constitute primary
divisions of their states; these incorporated places are known as
"independent cities". The District of Columbia has no primary division.
In American Samoa, the primary divisions are districts and islands. In
the Northern Mariana Islands, the primary subdivision is municipalities.
In Puerto Rico, the primary subdivision is municipios. In the Virgin
Islands, the principal islands of St. Croix, St. John, and St. Thomas
are the division. Guam has no primary divisions.

Entity Type: GU

C.11 County subdivision

County subdivisions are the primary divisions of counties and
statistically equivalent entities for data presentation purposes. They
include census county divisions, census subareas, minor civil divisions
(MCDs), unorganized territories, and incorporated places that are
independent of any MCD. In Puerto Rico, Barrio and Barrio-Pueblo are
legal subdivisions of a municipio.

Entity Type: Legal

C.12 Hawaiian Home Land

Hawaiian Home Lands are areas held in trust for native Hawaiians by the
state of Hawaii, pursuant to the Hawaiian Homes Commission Act of 1920,
as amended.

Entity Type: Legal

C.13 Incorporated Place

Incorporated places are legally established in each state, under the
laws of their respective states. Some examples are cities, boroughs,
city and borough, municipalities, towns, and villages. In four states
(Maryland, Missouri, Nevada, and Virginia), there are one or more
incorporated places known as "independent cities" that are primary
subdivisions of a state and legally not part of any county.

Entity Type: GU and legal

C.14 Minor Civil Division

Minor civil divisions (MCDs) are the primary governmental or
administrative divisions of a county in many states (parish in
Louisiana). They represent many different kinds of legal entities with a
wide variety of governmental and/or administrative functions. Some
examples of MCDs are assessment districts, charter townships, gores,
grants, locations, magisterial districts, road districts, and townships.

Entity Type: GU and Legal

C.15 Municipality

Municipalities are legally established entities in Alaska and the
Northern Mariana Islands.

Entity Type: Legal

C.16 Sub-Minor Civil Division

Sub-Minor Civil Divisions (Sub-MCDs) are second-order subdivision of
counties and equivalent entities, for example, subbarios in Puerto Rico.

Entity Type: Legal

C.17 Special district

Special district governments are independent, special-purpose
governmental units (other than school district governments) that exist
as separate entities with substantial administrative and fiscal
independence from general-purpose local governments. Special district
governments provide specific services that are not being supplied by
existing general purpose governments. Most perform a single function,
but in some instances, their enabling legislation allows them to provide
several, usually related, types of services.

Entity Type: Legal

C.18 States and equivalent entities

States are the primary governmental divisions of the United States. The
District of Columbia is treated as a statistical equivalent of a state.
Some federal agencies also treat a number of entities that are not legal
divisions of the United States as statistically equivalent to a state:
American Samoa, the Commonwealth of the Northern Mariana Islands, Guam,
Puerto Rico, and the Virgin Islands of the United States.

Entity Type: GU

C.19 State legislative district

State legislative districts (SLDs) are the areas from which members are
elected to state legislatures. The SLDs embody the upper (senate) and
lower (house) chambers of the state legislature.

Entity Type: Legal

C.20 Subbario

Subbarrios are legal subdivisions of Barrio and Barrio-Pueblo.
Subbarrios in 23 municipios are the primary legal subdivisons of the
barrio-pueblo and some barrios. There are no geographic entities in the
United States equivalent to the subbarrio.

Entity Type: Legal

C.21 Town

A type of functioning minor civil division found in the New England
states, New York, and Wisconsin; a type of incorporated place in 30
states and the Virgin Islands of the United States.

Entity Type: GU

C.22 Village

A type of incorporated place in 20 States and American Samoa.

Entity Type: GU

**Annex D**

**(informative)**

**Governmental unit boundary encoding example**

Annex D (informative) provides examples of the information that would be
provided when exchanging GU boundary information. Example D.1 documents
how one could exchange Delaware state boundary information as a set of
curves and example D.2 documents a similar exchange, but for the three
Delaware counties as a set of polygons. FGDC compliant metadata
applicable for both examples D.1 and D.2 is provided in D.3. The
metadata in D.3 is entered only one time because it is the same for both
examples. The examples and metadata are presented as flat ASCII files.
Spaces between lines are for readability only.

**NOTE: This annex is for illustrative purposes only; the actual
encoding of governmental unit boundary information depends upon the
application.**

**D.1 Delaware state curve example**

This is an example of encoding a single entity whose boundary is defined
by a series of curve segments. For this example, the coastline is
considered the state boundary.

> GU_Dataset:
>
> GU_DatasetDescription:
>
> Name: Example_curve.txt
>
> Citation: Example of how to encode a boundary of a single entity
> defined by a series of curve segments.
>
> GU_LineSet:

GU_Curve:

> startPoint: -75.79, 39.72
>
> intermediatePoint \[2\]:
>
> -75.76, 39.30
>
> -75.72, 38.83
>
> endPoint: -75.70, 38.46
>
> guInstanceName: Delaware
>
> guTypeNameReference: State
>
> guCurveSegmentID: 1
>
> guInstanceCode: 10
>
> guCodingSystemReference: FIPS State Code
>
> guFunctionalStatus: active
>
> GU_Curve:
>
> startPoint: -75.70, 38.46
>
> endPoint: -75.04, 38.45
>
> guInstanceName: Delaware
>
> guTypeNameReference: State
>
> guCurveSegmentID: 2
>
> guInstanceCode: 10
>
> guCodingSystemReference: FIPS State Code
>
> guFunctionalStatus: active
>
> GU_Curve:
>
> startPoint: -75.04, 38.45
>
> endPoint: -75.08, 38.80
>
> guInstanceName: Delaware
>
> guTypeNameReference: State
>
> guCurveSegmentID: 3
>
> guInstanceCode: 10
>
> guCodingSystemReference: FIPS State Code
>
> guFunctionalStatus: active
>
> GU_Curve:
>
> startPoint: -75.08, 38.80
>
> intermediatePoint\[10\]:
>
> -75.19, 38.81
>
> -75.31, 38.94
>
> -75.32, 39.01
>
> -75.40, 39.07
>
> -75.40, 39.25
>
> -75.52, 39.36
>
> -75.59, 39.46
>
> -75.56, 39.57
>
> -75.61, 39.61
>
> -75.48, 39.72
>
> endPoint: -75.41, 39.79
>
> guInstanceName: Delaware
>
> guTypeNameReference: State
>
> guCurveSegmentID: 4
>
> guInstanceCode: 10
>
> guCodingSystemReference: FIPS State Code
>
> guFunctionalStatus: active
>
> GU_Curve:
>
> startPoint: -75.41, 39.79
>
> intermediatePoint\[4\]:
>
> -75.48, 39.82
>
> -75.58, 39.40
>
> -75.66, 39.83
>
> -75.73, 39.78
>
> endPoint: -75.79, 39.72
>
> guInstanceName: Delaware
>
> guTypeNameReference: State
>
> guCurveSegmentID: 5
>
> guInstanceCode: 10
>
> guCodingSystemReference: FIPS State Code
>
> guFunctionalStatus: active
>
> GU_GovernmentalUnit:
>
> guTypeName: State
>
> guTypeNameAbbreviation: ST
>
> guTypeDefinition: States are the primary governmental divisions of the
> United States. The District of Columbia is treated as a statistical
> equivalent of a state. Some federal agencies also treat a number of
> entities that are not legal divisions of the United States as
> statistically equivalent to a state: American Samoa, the Commonwealth
> of the Northern Mariana Islands, Guam, Puerto Rico, and the Virgin
> Islands of the United States.
>
> guCodingSystemReference: FIPS State Code
>
> guContiguousRelationshipList\[5\]:
>
> curve segment 1 and Maryland State Boundary
>
> curve segment 2 and Maryland State Boundary
>
> curve segment 3 and Atlantic Ocean
>
> curve segment 4 and Delaware Bay
>
> curve segment 5 and Pennsylvania State Boundary

**D.2 Delaware counties polygon example**

This is an example of encoding multiple entities whose boundaries are
defined by polygons. For this example, the coastline is the county
boundary.

> GU_Dataset:

GU_DatasetDescription:

> Name: Example_polygon.txt
>
> Citation: Example of how to encode a boundary of multiple entities
> defined by polygons.
>
> GU_PolygonSet:
>
> GU_Polygon:
>
> startPoint: -75.79, 39.72
>
> intermediatePoint\[15\]:
>
> -75.76, 39.30
>
> -75.70, 39.30
>
> -75.66, 39.29
>
> -75.61, 39.31
>
> -75.56, 39.34
>
> -75.52, 39.36
>
> -75.59, 39.46
>
> -75.56, 39.57
>
> -75.61, 39.61
>
> -75.48, 39.72
>
> -75.41, 39.79
>
> -75.48, 39.82
>
> -75.58, 39.40
>
> -75.66, 39.83
>
> -75.73, 39.78
>
> endPoint: -75.79, 39.72
>
> guInstanceName: New Castle
>
> guTypeNameReference: County
>
> guPolygonID: N
>
> guInstanceCode: 10003
>
> guCodingSystemReference: FIPS State and County Code
>
> guFunctionalStatus: active
>
> GU_GovernmentalUnit:
>
> guTypeName: County
>
> guTypeNameAbbreviation: CO
>
> guTypeDefinition: The primary legal divisions of most states are
> termed "counties." In Louisiana, these divisions are known as
> parishes. In Alaska, which has no counties, the statistically
> equivalent entities are census areas, city and boroughs (as in Juneau
> City and Borough), a municipality (Anchorage), and organized boroughs.
> In four states (Maryland, Missouri, Nevada, and Virginia), there are
> one or more incorporated places that are independent of any county
> organization and thus constitute primary divisions of their states;
> these incorporated places are known as "independent cities". The
> District of Columbia has no primary division. In American Samoa, the
> primary divisions are districts and islands. In the Northern Mariana
> Islands, the primary subdivision is municipalities. In Puerto Rico,
> the primary subdivision is municipios. In the Virgin Islands, the
> principal islands of St. Croix, St. John, and St. Thomas are the
> division. Guam has no primary divisions.
>
> guCodingSystemReference: FIPS State and County Code

guMaintenanceRelationshipList\[1\]:

Nests within state of Delaware

> guContiguousRelationshipList\[5\]:
>
> County boundary and Delaware River
>
> County boundary and Pennsylvania state boundary
>
> County boundary and Delaware Bay
>
> County boundary and Kent county boundary
>
> County boundary and Maryland state boundary
>
> GU_Polygon:
>
> startPoint: -75.76, 39.30
>
> intermediatePoint\[11\]:
>
> -75.72, 38.83
>
> -75.62, 38.83
>
> -75.52, 38.86
>
> -75.45, 38.91
>
> -75.40, 38.93
>
> -75.39, 38.95
>
> -75.31, 38.94
>
> -75.32, 39.01
>
> -75.40, 39.07
>
> -75.40, 39.25
>
> -75.52, 39.36
>
> endPoint: : -75.76, 39.30
>
> guInstanceName: Kent
>
> guTypeNameReference: County
>
> guPolygonID: K
>
> guInstanceCode: 10001
>
> guCodingSystemReference: FIPS State and County Code
>
> guFunctionalStatus: active
>
> GU_GovernmentalUnit:
>
> guTypeName: County
>
> guTypeNameAbbreviation: CO
>
> guTypeDefinition: Same as guPolygonID: N
>
> guCodingSystemReference: FIPS State and County Code
>
> guMaintenanceRelationshipList\[1\]:
>
> Nests within the state of Delaware
>
> guContiguousRelationshipList\[4 \]:
>
> County boundary and Maryland state boundary
>
> County boundary and New Castle county boundary
>
> County boundary and Delaware Bay?
>
> County boundary and Sussex county boundary
>
> GU_Polygon:
>
> startPoint: -75.72, 38.83
>
> intermediatePoint\[10\]:
>
> -75.70, 38.46
>
> -75.04, 38.45
>
> -75.08, 38.80
>
> -75.19, 38.81
>
> -75.31, 38.94
>
> -75.39, 38.95
>
> -75.40, 38.93
>
> -75.45, 38.91
>
> -75.52, 38.86
>
> -75.62, 38.83
>
> endPoint: -75.72, 38.83
>
> guInstanceName: Sussex
>
> guTypeNameReference: County
>
> guPolygonID: S
>
> guInstanceCode: 10005
>
> guCodingSystemReference: FIPS State and County Code
>
> guFunctionalStatus: active
>
> GU_GovernmentalUnit:
>
> guTypeName: County
>
> guTypeNameAbbreviation: CO
>
> guTypeDefinition: Same as guPolygonID: N
>
> guCodingSystemReference: FIPS State and County Code
>
> guMaintenanceRelationshipList\[1\]:
>
> Nests within the state of Delaware
>
> guContiguousRelationshipList\[4\]:
>
> County boundary and Maryland state boundary
>
> County boundary and Kent county boundary
>
> County boundary and Delaware Bay
>
> County boundary and Atlantic Ocean

**NOTE: This annex is for illustrative purposes only; the actual
encoding of governmental unit boundary information depends upon the
application.**

**D.3 Example metadata**

Identification_Information:

Citation:

Citation_Information:

Originator: Bureau of Transportation Statistics (comp.)

Publication_Date: 1997

Title: 104th Congressional District Boundaries

Publication_Information:

Publication_Place: Washington, DC

Publisher: Bureau Transportation Statistics

Description:

Abstract: The 104th Congressional District Boundaries database is a
geographic database of political boundaries of the 104th Congressional
districts.

Purpose: The data provide users with information about the locations of
congressional districts, primarily for national planning applications.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1995

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Annually

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -75.66, 39.83

East_Bounding_Coordinate: -75.00, 38.80

North_Bounding_Coordinate: -75.66, 39.83

South_Bounding_Coordinate: -75.79, 39.72

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: area

Theme_Keyword: background

Theme_Keyword: polygon

Theme_Keyword: boundary

Theme_Keyword: congressional district

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Access_Constraints: None

Use_Constraints: None. Acknowledgement of the Bureau of Transportation
Statistics National Transportation Atlas Database would be appreciated
in products derived from these data.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No Information

Logical_Consistency_Report: No Information

Completeness_Report: No Information

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Census Bureau

Publication_Date: 1994

Title: TIGER Extract - Thinned Boundary Files

Type_of_Source_Media: Online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1994

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: TIGER

Source_Contribution: Spatial information for the 104th Congressional
District boundaries.

Process_Step:

Process_Description: Individual files for the Congressional Districts in
Alaska, Hawaii, Puerto Rico, and the 48 contiguous states were merged
into a single data set.

Process_Date: 1995

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000464

Longitude_Resolution: 0.000464

Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum 83

Ellipsoid_Name: Geodetic Reference System 80

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: CD104.ARE

Entity_Type_Definition: Polygon Attribute Table.

Entity_Type_Definition_Source: U.S. Census Bureau

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: BTS Product Distribution Center

Contact_Address:

Address_Type: mailing and physical address

Address: 400 Seventh Street, SW

City: Washington

State_or_Province: District of Columbia

Postal_Code: 20590

Contact_Voice_Telephone: (202) 366 DATA

Contact_Facsimile_Telephone: (202) 366 3640

Distribution_Liability: No information

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: BTS (Bureau of Transportation Statistics standard format
for spatial data)

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.bts.gov/gis/ntatlas/background.html

> Fees: No information

Metadata_Reference_Information:

Metadata_Date: 19950830

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Bureau of Transportation Statistics

Contact_Address:

Address_Type: mailing and physical address

Address: 400 Seventh Street, SW

City: Washington

State_or_Province: District of Columbia

Postal_Code: 20590

Contact_Voice_Telephone: (202) 366 3282

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial
Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

**Annex E**

**(informative)**

**Use of standard with other entities**

While this Standard provides a standardized way to communicate boundary
information for GUs and other specified legal entities, it may be used
to communicate boundary information about other geographic entities.
Annex E (informative) provides a non-exhaustive list of other geographic
entities for which this Standard may be used:

>  Local Legislative District
>
>  Tribal Legislative District
>
>  Voting District/Polling District
>
>  School District
>
>  Special Local District
>
>  Federally defined or owned, and managed land (National Park Service
> areas, Bureau of Land Management areas, National Forest Service areas)
>
>  State owned and managed land (state parks, state game lands, legally
> defined traffic zones)
>
>  Locally owned and managed land (local parks, municipal land fills)
>
>  Tribal owned and managed land
>
>  Federally regulated or programmatic administration area
> (empowerment/enterprise zones, off-shore mineral rights, community
> block grant areas, qualified neighborhood areas qualifying for funding
> under some statute or regulation.

**Annex F**

**(informative)**

**Governmental unit boundary file metadata requirement**

Annex F (informative) describes the metadata information necessary to
document a GU or other legal entity boundary dataset for exchange. Annex
F is a subset of relevant FGDC *Content Standards for Digital Geospatial
Metadata (Version 2.0)* metadata elements, maintaining all mandatory
elements. Definitions for the terminology describing the characteristics
of the data are the same as those defined for in Annex B (normative),
provided in 7.2. This table is to be read in the same manner as that of
Annex B.

  --------------------- --------------------- ------------------------- ------------------------------- -------------- -------- ----------
  **Section/Element**   **Name**              **Definition/Content**    **Domain**                      **O/C**        **MO**   **Data
                                                                                                                                Type**

  **Number**                                                                                                                    

  1.0                   Identification        Basic information about   Lines 1.1-1.9                   M              1        Compound
                        Information           the data set                                                                      

  1.1                   Citation              Information to be used to Line 8.0                        M              1        Compound
                                              reference the data set                                                            

  1.2                   Description           A characterization of the Lines 1.2.1-1.2.2               M              1        Compound
                                              data set, including its                                                           
                                              intended use and                                                                  
                                              limitations                                                                       

  1.2.1                 Abstract              A brief narrative summary Free text                       M              1        Text
                                              of the data set                                                                   

  1.2.2                 Purpose               A summary of the          Free text                       M              1        Text
                                              intentions with which the                                                         
                                              data set was developed                                                            

  1.3                   Time Period Content   Time period(s) for which  Line 9.0                        M              1        Compound
                                              the data set corresponds                                                          
                                              to the currentness                                                                
                                              reference                                                                         

  1.3.1                 Currentness Reference The basis on which the    \"ground condition\" \"         M              1        Text
                                              time period of content    publication date\" Free text                            
                                              information is determined                                                         

  1.4                   Status                The state of and          Lines 1.4.1-1.4.2               M              1        Compound
                                              maintenance information                                                           
                                              for the data set                                                                  

  1.4.1                 Progress              The state of the data set \"complete\" \"in work\"        M              1        Text
                                                                        \"planned\"                                             

  1.4.2                 Maintenance and       The frequency with which  \"continually\" \"daily\"       M              1        Text
                        Update Frequency      changes and additions are \"weekly\" \"monthly\"                                  
                                              made to the data set      \"annually\" \"unknown\" \"as                           
                                              after the initial data    needed\" \"irregular\" \"none                           
                                              set is completed          planned\" Free text                                     

  1.5                   Spatial Domain        The geographic areal      Lines 1.5.1-1.5.1.4             M              1        Compound
                                              domain of the data set                                                            

  1.5.1                 BoundingCoordinates   The limits of coverage of Lines 1.5.1.1-1.5.1.4           M              1        Compound
                                              a data set expressed by                                                           
                                              latitude and longitude                                                            
                                              values in the order                                                               
                                              western-most,                                                                     
                                              eastern-most,                                                                     
                                              northern-most, and                                                                
                                              southern-most. For data                                                           
                                              sets that include a                                                               
                                              complete band of latitude                                                         
                                              around the earth, the                                                             
                                              West Bounding Coordinate                                                          
                                              shall be assigned the                                                             
                                              value -180.0, and the                                                             
                                              East Bounding Coordinate                                                          
                                              shall be assigned the                                                             
                                              value 180.0.                                                                      

  1.5.1.1               West Bounding         Western-most coordinate   -180.0\<=West Bounding          M              1        Real
                        Coordinate            of the limit of coverage  Coordinate\<=180.0                                      
                                              expressed in longitude                                                            

  1.5.1.2               East Bounding         Eastern-most coordinate   -180.0\<=East Bounding          M              1        Real
                        Coordinate            of the limit of coverage  Coordinate\<=180.0                                      
                                              expressed in longitude                                                            

  1.5.1.3               North Bounding        Northern-most coordinate  -90.0\<=North Bounding          M              1        Real
                        Coordinate            of the limit of coverage  Coordinate\<=90.0; North                                
                                              expressed in latitude     Bounding Coordinate\<=South                             
                                                                        Bounding Coordinate                                     

  1.5.1.4               South Bounding        Southern-most coordinate  -90.0\<=South Bounding          M              1        Real
                        Coordinate            of the limit of coverage  Coordinate\<=90.0; South                                
                                              expressed in latitude     Bounding Coordinate\<=North                             
                                                                        Bounding Coordinate                                     

  1.6                   Keywords              Words or phrases          Lines 1.6.1-1.6.2.2             M              1        Compound
                                              summarizing an aspect of                                                          
                                              the data set                                                                      

  1.6.1                 Theme                 Subjects covered by the   Lines 1.6.1.1-1.6.1.2           M              N        Compound
                                              data set (for a list of                                                           
                                              commonly used thesauri,                                                           
                                              see Part IV:                                                                      
                                              Subject/index term                                                                
                                              sources in Network                                                                
                                              Development and MARC                                                              
                                              Standards Office, 1988,                                                           
                                              [US MARC code list for                                                            
                                              realtors, sources, and                                                            
                                              description conventions:                                                          
                                              Washington, Library of                                                            
                                              Congress)]{.underline}                                                            

  1.6.1.1               Theme Keyword         Reference to a formally   \"None\" Free text              M              1        Text
                        Thesaurus             registered thesaurus or a                                                         
                                              similar authoritative                                                             
                                              source of theme keywords                                                          

  1.6.1.2               Theme Keyword         Common-use word or phrase Free text                       M              N        Text
                                              used to describe the                                                              
                                              subject of the data set                                                           

  1.6.2                 Place                 Geographic locations      1.6.2.1-1.6.2.2                 C - if         N        Compound
                                              characterized by the data                                 geographic              
                                              set                                                       location is             
                                                                                                        expressed in a          
                                                                                                        nominal,                
                                                                                                        geometric               
                                                                                                        manner                  

  1.6.2.1               Place Keyword         Reference to a formally   \"None\" \"Geographic Names     M              1        Text
                        Thesaurus             registered thesaurus or a Information System\" Free text                          
                                              similar authoritative                                                             
                                              source of theme place                                                             
                                              keywords                                                                          

  1.6.2.2               Place Keyword         The geographic name of a  Free text                       M              N        Text
                                              location covered by a                                                             
                                              data set                                                                          

  1.7                   Access Constraints    Restrictions and legal    \"None\" Free text              M              1        Text
                                              prerequisites for                                                                 
                                              accessing the data set.                                                           
                                              These include any access                                                          
                                              constraints applied to                                                            
                                              assure the protection of                                                          
                                              privacy or intellectual                                                           
                                              property, and any special                                                         
                                              restrictions or                                                                   
                                              limitations on using the                                                          
                                              data set                                                                          

  1.8                   Use Constraints       Restrictions and legal    \"None\" Free text              M              1        Text
                                              prerequisites for using                                                           
                                              the data set after access                                                         
                                              is granted. These include                                                         
                                              any use constraints                                                               
                                              applied to assure the                                                             
                                              protection of privacy or                                                          
                                              intellectual property,                                                            
                                              and any special                                                                   
                                              restrictions or                                                                   
                                              limitations on using the                                                          
                                              data set                                                                          

  1.9                   Point of Contact      Contact information for   Line 10.0                       O              1        Compound
                                              an individual or                                                                  
                                              organization that is                                                              
                                              knowledgeable about the                                                           
                                              data set                                                                          

  2.0                   Data Quality          A general assessment of   Lines 2.1-2.5.2.3               C - when data  1        Compound
                        Information           the quality of the data                                   quality                 
                                              set (Recommendations on                                   information is          
                                              information to be                                         available for           
                                              reported and tests to be                                  the data set            
                                              performed are found in                                                            
                                              \"Spatial Data Quality\"                                                          
                                              which is chapter 3 of                                                             
                                              part 1 in Department of                                                           
                                              Commerce, 1992, Spatial                                                           
                                              Data Transfer Standard                                                            
                                              (SDTS) (Federal                                                                   
                                              Information Processing                                                            
                                              Standard 173):                                                                    
                                              Washington, Department of                                                         
                                              Commerce, National                                                                
                                              Institute of Standards                                                            
                                              and Technology.)                                                                  

  2.1                   Attribute Accuracy    An assessment of the      Line 2.1.1                      C - when       1        Compound
                                              accuracy of the                                           attribute               
                                              identification of                                         accuracy                
                                              entities and assignment                                   quality                 
                                              of attribute values in                                    information is          
                                              the data set                                              available for           
                                                                                                        the data set            

  2.1.1                 Attribute Accuracy    An explanation of the     Free text                       M              1        Text
                        Report                accuracy of the                                                                   
                                              identification of the                                                             
                                              entities and assignments                                                          
                                              of values in the data set                                                         
                                              and a description of the                                                          
                                              tests used                                                                        

  2.2                   Logical Consistency   An explanation of the     Free text                       M              1        Text
                        Report                fidelity of relationships                                                         
                                              in the data set and tests                                                         
                                              used                                                                              

  2.3                   Completeness Report   Information about         Free text                       M              1        Text
                                              omissions, selection                                                              
                                              criteria, generalization,                                                         
                                              definitions used, and                                                             
                                              other rules used to                                                               
                                              derive the data set                                                               

  2.4                   Positional Accuracy   An assessment of the      Lines 2.4.1-2.4.2.1             C - when       1        Compound
                                              accuracy of the positions                                 positional              
                                              of spatial objects                                        accuracy                
                                                                                                        quality                 
                                                                                                        information is          
                                                                                                        available for           
                                                                                                        the data set            

  2.4.1                 Horizontal Positional An estimate of accuracy   Line 2.4.1.1                    C - when       1        Compound
                        Accuracy              of the horizontal                                         horizontal              
                                              positions of the spatial                                  positional              
                                              objects                                                   accuracy                
                                                                                                        quality                 
                                                                                                        information is          
                                                                                                        available for           
                                                                                                        the data set            

  2.4.1.1               Horizontal Positional An explanation of the     Free text                       M              1        Text
                        Accuracy Report       accuracy of the                                                                   
                                              horizontal coordinate                                                             
                                              measurements and a                                                                
                                              description of the tests                                                          
                                              used                                                                              

  2.4.2                 Vertical Positional   An estimate of accuracy   Line 2.4.2.1                    C - when       1        Compound
                        Accuracy              of the vertical positions                                 vertical                
                                              in the data set                                           positional              
                                                                                                        accuracy                
                                                                                                        quality                 
                                                                                                        information is          
                                                                                                        available for           
                                                                                                        the data set            

  2.4.2.1               Vertical Positional   An explanation of the     Free text                       M              1        Text
                        Accuracy Report       accuracy of the vertical                                                          
                                              coordinate measurements                                                           
                                              and a description of the                                                          
                                              tests used                                                                        

  2.5                   Lineage               Information about the     Lines 2.5.1-2.5.2.3             M              1        Compound
                                              events, parameters, and                                                           
                                              source data which                                                                 
                                              constructed the data set,                                                         
                                              and information about the                                                         
                                              responsible parties                                                               

  2.5.1                 Source Information    List of sources and a     Lines 2.5.1-2.5.1.6             C - if source  N        Compound
                                              short discussion of the                                   information is          
                                              information contributed                                   known and               
                                              by each                                                   relevant to             
                                                                                                        the quality             

  2.5.1.1               Source Citation       Reference for a sources   Line 8.0                        M              1        Compound
                                              data set                                                                          

  2.5.1.3               Type of Source Media  The medium of the source  \"paper\" \"stable-base         M              1        Text
                                              data set                  material\" \"microfiche\"                               
                                                                        \"microfilm\" \"audiocassette\"                         
                                                                        \"chart\" \" filmstrip\"                                
                                                                        \"transparency\"                                        
                                                                        \"videocassette\" \"videodisc\"                         
                                                                        \"videotape\" \"physical                                
                                                                        model\" \"computer program\"                            
                                                                        \"disc\" \"cartridge tape\"                             
                                                                        \"magnetic tape\" \"online\"                            
                                                                        \"CD-ROM\" \"electronic                                 
                                                                        bulletin board\" \"electronic                           
                                                                        mail system\" Free text                                 

  2.5.1.4               Source Time Period of Time period(s) for which  Lines 2.5.1.4.1, 9.0            M              1        Compound
                        Content               the source data set                                                               
                                              corresponds to the ground                                                         

  2.5.1.4.1             Source Currentness    The basis on which the    \"ground condition\"            M              1        Text
                        Reference             source time period of     \"publication date\" Free text                          
                                              content information of                                                            
                                              the data is determined                                                            

  2.5.1.5               Source Citation       Short-form alias for the  Free text                       M              1        Text
                        Abbreviation          source citation                                                                   

  2.5.1.6               Source Contribution   Brief statement           Free text                       M              1        Text
                                              identifying the                                                                   
                                              information contributed                                                           
                                              by the source to the data                                                         
                                              set                                                                               

  2.5.2                 Process Step          Information about a       Lines 2.5.2.1-2.5.2.3           M              N        Compound
                                              single event                                                                      

  2.5.2.1               Process Description   An explanation of the     Free text                       M              1        Text
                                              event and related                                                                 
                                              parameters or tolerances                                                          

  2.5.2.3               Process Date          The date when the event   \"unknown\" \"not complete\"    M              1        Date
                                              was completed             free date                                               

  4.0                   Spatial Reference     The description of the    Lines 4.1-4.2.2.4               C - if the     1        Compound
                        Information           reference frame for, and                                  reference               
                                              the means to encode,                                      frame of                
                                              coordinates in the data                                   coordinates             
                                              set                                                       and/or                  
                                                                                                        coordinate              
                                                                                                        encoding means          
                                                                                                        is known                

  4.1                   Horizontal Coordinate The reference frame or    Lines 4.1.1-4.1.4.4             C - if the     1        Compound
                        System Definition     system from which linear                                  reference               
                                              or angular quantities are                                 frame of                
                                              measured and assigned to                                  horizontal              
                                              the position that a point                                 coordinates             
                                              occupies                                                  and/or the              
                                                                                                        horizontal              
                                                                                                        coordinate              
                                                                                                        encoding means          
                                                                                                        is known                

  4.1.1 OR 4.1.2 OR                                                     Lines 4.1.1.1-4.1.1.3 OR        M (one option            
  4.1.3                                                                 4.1.2.1-4.1.2.4.4 OR            must be                 
                                                                        4.1.3.1-4.1.3.2                 selected)               

  4.1.1                 Geographic            The quantities of         Lines 4.1.1.1-4.1.1.3           M              1        Compound
                                              latitude and longitude                                                            
                                              which define the position                                                         
                                              of a point on the                                                                 
                                              Earth\'s surface with                                                             
                                              respect to a reference                                                            
                                              spheroid                                                                          

  4.1.1.1               Latitude Resolution   The minimum difference    Latitude Resolution \> 0.0      M              1        Real
                                              between two adjacent                                                              
                                              latitude values expressed                                                         
                                              in Geographic Coordinate                                                          
                                              Units of measure                                                                  

  4.1.1.2               Longitude Resolution  The minimum difference    Longitude Resolution \> 0.0     M              1        Real
                                              between two adjacent                                                              
                                              longitude values                                                                  
                                              expressed in Geographic                                                           
                                              Coordinate Units of                                                               
                                              measure                                                                           

  4.1.1.3               Geographic Coordinate Units of measure used for \"decimal degrees\" \"decimal   M              1        Text
                        Units                 the latitude and          minutes\" decimal seconds\"                             
                                              longitude values          \"degrees and decimal minutes\"                         
                                                                        \"degrees, minutes, and decimal                         
                                                                        seconds\" \"radians\" \"grads\"                         

  4.1.2                 Planar                The quantities of         Lines 4.1.2.1-4.1.2.1.1         M              N        Compound
                                              distances, or distances                                                           
                                              and angles, which define                                                          
                                              the position of a point                                                           
                                              on a reference plane to                                                           
                                              which the surface of the                                                          
                                              Earth has been projected                                                          

  4.1.2.1 OR 4.1.2.2 OR                                                 Lines 4.1.2.1.1 OR 4.1.2.2.1 OR  M (one option           
  4.1.2.3                                                               4.1.2.3.1-4.1.2.4.4             must be                 
                                                                                                        selected)               

  4.1.2.1               Map Projection        The systematic            Lines 4.1.2.1.1                 M              1        Compound
                                              representation of all or                                                          
                                              part of the surface of                                                            
                                              the Earth on a plane or                                                           
                                              developable surface                                                               

  4.1.2.1.1             Map Projection Name   Name of the map           \"Albers Conical Equal Area\"   M              1        Text
                                              projection                \"Azimuthal Equidistant\"                               
                                                                        \"Equidistant Conic\"                                   
                                                                        \"Equirectangular\" \"General                           
                                                                        Vertical Near-Sided                                     
                                                                        Perspective\" \"Gnomonic\"                              
                                                                        \"Lampert Azimuthal Equal                               
                                                                        Area\" \"Lambert Conformal                              
                                                                        Conic\" \"Mercator\" \"Modified                         
                                                                        Stereographic for Alaska\"                              
                                                                        \"Miller Cylindrical\"                                  
                                                                        \"Oblique Mercator\"                                    
                                                                        \"Orthographic\" \"Polar                                
                                                                        Stereographic\" \"Polyconic\"                           
                                                                        \"Robinson\" \"Sinusoidal\"                             
                                                                        \"Space Oblique Mercator\"                              
                                                                        \"Stereographic\" \"Transverse                          
                                                                        Mercator\" \"van der Grinten\"                          
                                                                        Free text                                               

  4.1.2.2               Grid Coordinate       A plane-rectangular       Line 4.1.2.2.1                  M              1        Compound
                        System                coordinate system usually                                                         
                                              based on, and                                                                     
                                              mathematically adjusted                                                           
                                              to, a map projection so                                                           
                                              that geographic positions                                                         
                                              can be readily                                                                    
                                              transformed to and from                                                           
                                              plane coordinates                                                                 

  4.1.2.2.1             Grid Coordinate       Name of the grid          \"Universal Transverse          M              1        Text
                        System Name           coordinate system         Mercator\" \"State Plane                                
                                                                        Coordinate System 1927\"                                
                                                                        \"State Plane Coordinate System                         
                                                                        1983\" \"ARC Coordinate                                 
                                                                        System\" \"other grid system\"                          

  4.1.2.3               Local Planar          Any right-handed planar   Lines 4.1.2.3.1-4.1.2.3.2       M              1        Compound
                                              coordinate system of                                                              
                                              which the z-axis                                                                  
                                              coincides with a plumb                                                            
                                              line through the origin                                                           
                                              that locally is aligned                                                           
                                              with the surface of the                                                           
                                              Earth                                                                             

  4.1.2.3.1             Local Planar          A description of the      Free text                       M              1        Text
                        Description           local planar system                                                               

  4.1.2.3.2             Local Planar          A description of the      Free text                       M              1        Text
                        Georeference          information provided to                                                           
                        Information           register the local planar                                                         
                                              system to the Earth (e.g.                                                         
                                              control points, satellite                                                         
                                              ephemeral data, inertial                                                          
                                              navigation data)                                                                  

  4.1.2.4               Planar Coordinate     Information about the     Lines 4.1.2.4.1                 M              1        Compound
                        Information           coordinate system                                                                 
                                              developed on the planar                                                           
                                              surface                                                                           

  4.1.2.4.1             Planar Coordinate     The means used to         \"coordinate pair\" \"distance  M              1        Text
                        Encoding Method       represent horizontal      and bearing\" \"row and                                 
                                              positions                 column\"                                                

  4.1.2.4.2 OR                                                          Lines 4.1.2.4.2.1-4.1.2.4.2.2    M (one option           
  4.1.2.4.3                                                             OR 4.1.2.4.3.1-4.1.2.4.3.5      must be                 
                                                                                                        selected)               

  4.1.2.4.2             Coordinate            The method of encoding    Lines 4.1.2.4.2.1-4.1.2.4.2.2   M              1        Compound
                        Representation        the position of a point                                                           
                                              by measuring its distance                                                         
                                              from perpendicular                                                                
                                              reference axes (the                                                               
                                              \"coordinate pair\" and                                                           
                                              \"row and column\"                                                                
                                              methods)                                                                          

  4.1.2.4.2.1           Abscissa Resolution   The (nominal) minimum     Abscissa Resolution\> 0.0       M              1        Real
                                              distance between the                                                              
                                              \"x\" or column values of                                                         
                                              two adjacent points,                                                              
                                              expressed in Planar                                                               
                                              Distance Units of measure                                                         

  4.1.2.4.2.2           Ordinate Resolution   The (nominal) minimum     Ordinate Resolution \> 0.0      M              1        Real
                                              distance between the                                                              
                                              \"y\" or row values of                                                            
                                              two adjacent points,                                                              
                                              expressed in Planar                                                               
                                              Distance Units of measure                                                         

  4.1.2.4.3             Distance and Bearing  A method of encoding the  Lines 4.1.2.4.3.1-4.1.2.4.3.5   M              1        Compound
                        Representation        position of a point by                                                            
                                              measuring its distance                                                            
                                              and direction (azimuth                                                            
                                              angle) from another point                                                         

  4.1.2.4.3.1           Distance Resolution   The minimum distance      Distance Resolution \> 0.0      M              1        Real
                                              measurable between two                                                            
                                              points, expressed Planar                                                          
                                              Distance Units of measure                                                         

  4.1.2.4.3.2           Bearing Resolution    The minimum angle         Bearing Resolution \> 0.0       M              1        Real
                                              measurable between two                                                            
                                              points, expressed in                                                              
                                              Bearing Units of measure                                                          

  4.1.2.4.3.3           Bearing Units         Units of measure used for \"Decimal degrees\" \"Decimal   M              1        Text
                                              angles                    minutes\" \" Decimal Seconds\"                          
                                                                        \"Degrees and decimal minutes\"                         
                                                                        \"Degrees, minutes, and decimal                         
                                                                        seconds\" \"Radians\" \"Grads\"                         

  4.1.2.4.3.4           Bearing Reference     Direction from which the  \"North\" \"South\"             M              1        Text
                        Direction             bearing is measured                                                               

  4.1.2.4.3.5           Bearing Reference     Axis from which the       \"Assumed\" \"Grid\"            M              1        Text
                        Meridian              bearing is measured       \"Magnetic\" \"Astronomic\"                             
                                                                        \"Geodetic\"                                            

  4.1.2.4.4             Planar Distance Units Units of measure used for \"meters\" \"international      M              1        Text
                                              distances                 feet\" \"survey feet\" Free                             
                                                                        text                                                    

  4.1.3                 Local                 A description of any      Lines 4.1.3.1-4.1.3.2           M              1        Compound
                                              coordinate system that is                                                         
                                              not aligned with the                                                              
                                              surface of the Earth                                                              

  4.1.3.1               Local Description     A description of the      Free text                       M              1        Text
                                              coordinate system and its                                                         
                                              orientation to the                                                                
                                              surface of the Earth                                                              

  4.1.3.2               Local Georeference    A description of the      Free text                       M              1        Text
                        Information           information provided to                                                           
                                              register the local system                                                         
                                              to the Earth (e.g.                                                                
                                              control points, satellite                                                         
                                              ephemeral data, inertial                                                          
                                              navigation data)                                                                  

  4.1.4                 Geodetic Model        Parameters for the shape                                  C - if the     1        Compound
                                              of the earth                                              geodetic model          
                                                                                                        for the                 
                                                                                                        coordinates in          
                                                                                                        the dataset is          
                                                                                                        known                   

  4.1.4.1               Horizontal Datum Name The identification given  \"North American Datum of       C - if the     1        Text
                                              to the reference system   1927\" \"North American Datum   horizontal              
                                              used for defining the     of 1983\" Free text             datum for the           
                                              coordinates of points                                     coordinates in          
                                                                                                        the dataset is          
                                                                                                        known                   

  4.1.4.2               Ellipsoid Name        Identification given to   \"Clarke 1866\" \"Geodetic      M              1        Text
                                              established               Reference System 80\" Free text                         
                                              representations of the                                                            
                                              Earth\'s shape                                                                    

  4.1.4.3               Semi-Major Axis       Radius of the equatorial  Semi-major Axis \> 0.0          M              1        Real
                                              axis of the ellipsoid                                                             

  4.1.4.4               Denominator of        The denominator of the    Denominator of Flattening \>    M              1        Real
                        Flattening Ratio      ratio of the difference   0.0                                                     
                                              between the equatorial                                                            
                                              and polar radii of the                                                            
                                              ellipsoid when the                                                                
                                              numerator is set to 1                                                             

  4.2                   Vertical Coordinate   The reference frame or    Lines 4.2.1-4.2.2.4             C - if         1        Compound
                        System Definition     system from which                                         vertical                
                                              vertical distances                                        reference               
                                              (altitude or depths) are                                  frame or                
                                              measured                                                  system for the          
                                                                                                        coordinates in          
                                                                                                        the dataset is          
                                                                                                        known                   

  4.2.1                 Altitude System       The reference frame or    Lines 4.2.1.1-4.2.1.4           C - if         1        Compound
                        Definition            system from which                                         altitude                
                                              altitudes (elevations)                                    reference               
                                              are measured. The term                                    frame or                
                                              \"altitude\" is used                                      system for the          
                                              instead of the common                                     coordinates is          
                                              term \"elevation\" to                                     known                   
                                              conform to the                                                                    
                                              terminology in Federal                                                            
                                              Information Processing                                                            
                                              Standards 70-1 and 173                                                            

  4.2.1.1               Altitude Datum Name   The identification given  \"National Geodetic Vertical    M              1        Text
                                              to the surface taken as   Datum of 1929\" \"North                                 
                                              the surface of reference  American Vertical Datum of                              
                                              from which altitudes are  1998\" Free text                                        
                                              measured                                                                          

  4.2.1.2               Altitude Resolution   The minimum distance      Altitude Resolution \> 0.0      M              N        Real
                                              possible between two                                                              
                                              adjacent altitude values,                                                         
                                              expressed in Altitude                                                             
                                              Distance Units of measure                                                         

  4.2.1.3               Altitude Distance     Units in which altitudes  \"meters\" \"feet\" Free text   M              1        Text
                        Units                 are recorded                                                                      

  4.2.1.4               Altitude Encoding     The means used to encode  \"Explicit elevation coordinate M              1        Text
                        Method                the altitudes             included with horizontal                                
                                                                        coordinates\" \"Implicit                                
                                                                        coordinate\" \"Attribute                                
                                                                        values\"                                                

  4.2.2                 Depth System          The reference frame or    Lines 4.2.2.1-4.2.2.4           C - if depth   1        Compound
                        Definition            system from which depths                                  reference               
                                              are measured                                              frame or                
                                                                                                        system for the          
                                                                                                        coordinates is          
                                                                                                        known                   

  4.2.2.1               Depth Datum Name      The identification given  \"Local surface\" \"Chart       M              1        Text
                                              to surface of reference   datum; datum for sounding                               
                                              from which depths are     reduction\" \"Lowest                                    
                                              measured                  astronomical tide\" \"Highest                           
                                                                        astronomical tide\" \"Mean low                          
                                                                        water\" \"Mean high water\"                             
                                                                        \"Mean sea level\" \"Land                               
                                                                        survey datum\" \"Mean low water                         
                                                                        springs\" \"Mean high water                             
                                                                        springs\" \"Mean low water                              
                                                                        neap\" \"Mean high water neap\"                         
                                                                        \"Mean lower low water\" \"Mean                         
                                                                        lower high water\" \"Spring                             
                                                                        tide\" \"Tropic lower low                               
                                                                        water\" \"Neap tide\" \"High                            
                                                                        water\" \"Higher high water\"                           
                                                                        Low water\" \"Low-water datum\"                         
                                                                        \"Lowest low water\" \"Lower                            
                                                                        low water\" \"Lowest normal low                         
                                                                        water\" \"Mean tide level\"                             
                                                                        \"Indian spring low water\"                             
                                                                        \"High-water full and charge\"                          
                                                                        \"Low-water full and charge\"                           
                                                                        \"Columbia River datum\" \"Gulf                         
                                                                        Coast low water datum\"                                 
                                                                        \"Equatorial springs low                                
                                                                        water\" \"Approximate lowest                            
                                                                        astronomical tide\" \"No                                
                                                                        correction\" Free text                                  

  4.2.2.2               Depth Resolution      The minimum distance      Depth Resolution \> 0.0         M              N        Real
                                              possible between two                                                              
                                              adjacent depth values,                                                            
                                              expressed in Depth                                                                
                                              Distance Units of measure                                                         

  4.2.2.3               Depth Distance Units  Units in which depths are \"meters\" \"feet\" Free text   M              1        Text
                                              recorded                                                                          

  4.2.2.4               Depth Encoding Method The means used to encode  \"Explicit depth coordinate     M              1        Text
                                              depths                    included with horizontal                                
                                                                        coordinates\" \"Implicit                                
                                                                        coordinate\" \"Attribute                                
                                                                        values\"                                                

  5                     Entity and Attribute  Details about the         Lines 5.1-5.2.2                 C - if entity  1        Compound
                        Information           information content of                                    type, entity            
                                              the data set, including                                   attribute, and          
                                              the entity types, their                                   attribute               
                                              attributes, and the                                       value domains           
                                              domains from which                                        are used in             
                                              attribute values may be                                   the data set            
                                              assigned                                                                          

  5.1 AND/OR 5.2                                                        Lines 5.1.1-5.1.1.3 AND/OR      M (one option           Compound
                                                                        5.2.1-5.2.2                     must be                 
                                                                                                        selected )              

  5.1                   Detailed Description  Description of the        Lines 5.1.1-5.1.1.3             M              N        Compound
                                              entities, attributes,                                                             
                                              attribute values, and                                                             
                                              related characteristics                                                           
                                              encoded in the data set                                                           

  5.1.1                 Entity Type           The definition and        Lines 5.1.1.1-5.1.1.3           M              1        Compound
                                              description of a set into                                                         
                                              which similar entity                                                              
                                              instances are classified                                                          

  5.1.1.1               Entity Type Label     The name of the entity    Free text                       M              1        Text

  5.1.1.2               Entity Type           The description of the    Free text                       M              1        Text
                        Definition            entity type                                                                       

  5.1.1.3               Entity Type           The authority of the      Free text                       M              1        Text
                        Definition Source     definition                                                                        

  5.2                   Overview Description  Summary of, and citation  Lines 5.2.1-5.2.2               M              N        Compound
                                              to detailed description                                                           
                                              of, the information                                                               
                                              content of the data set                                                           

  5.2.1                 Entity and Attribute  Detailed summary of the   Free text                       M              1        Text
                        Overview              information contained in                                                          
                                              a data set                                                                        

  5.2.2                 Entity and Attribute  Reference to the complete Free text                       M              N        Text
                        Detail Citation       description of the entity                                                         
                                              types, attributes, and                                                            
                                              attribute values for the                                                          
                                              data set                                                                          

  6                     Distribution          Information about the     Lines 6.1-6.4.3                 C - if         N        Compound
                        Information           distributor of and                                        information             
                                              options for obtaining the                                 about data set          
                                              data set                                                  distribution            
                                                                                                        is available            
                                                                                                        or known                

  6.1                   Distributor           The party from whom the   Line 10.0                       M              1        Compound
                                              data set may be obtained                                                          

  6.3                   Distribution          Statement of the          Free text                       M              1        Text
                        Liability             liability assumed by the                                                          
                                              distributor                                                                       

  6.4                   Standard Order        The common ways in which  Lines 6.4.2-6.4.3               C - if order   N        Compound
                        Process               the data set may be                                       process exists          
                                              obtained or received, and                                 and is known            
                                              related instructions and                                                          
                                              fee information                                                                   

  6.4.1 OR 6.4.2                                                        Lines 6.4.1 OR 6.4.2.2.1.1.1.1  M (one option           Compound
                                                                                                        must be                 
                                                                                                        selected)               

  6.4.1                 Non-Digital Form      The description of        Free text                       M               1       Text
                                              options for obtaining the                                                         
                                              data set on                                                                       
                                              non-computer-compatible                                                           
                                              media                                                                             

  6.4.2                 Digital Form          The description of        Free text                       M              N        Text
                                              options for obtaining the                                                         
                                              data set on                                                                       
                                              computer-compatible media                                                         

  6.4.2.1               Digital Transfer      Description of the form   Line 6.4.2.1.1                  M              1        Compound
                        Information           of the data to be                                                                 
                                              distributed                                                                       

  6.4.2.1.1             Format Name           The name of the data      \"ARCE\" \"ARCG\" \"ASCII\"     M              1        Text
                                              transfer format           \"BIL\" \"BIP\" \"BSQ\" \"CDF\"                         
                                                                        \"CFF\" \"COORD\" \"DEM\"                               
                                                                        \"DFAD\" \"DGN\" \"DIGEST\"                             
                                                                        \"DLG\" \"DTED\" \"DWG\"                                
                                                                        \"DX90\" \"DXF\" \"ERDAS\"                              
                                                                        \"GRASS\" \"HDF\" \"IGDS\"                              
                                                                        \"IGES\" \"MOSS\" \"netCDF\"                            
                                                                        \"NITF\" \"RPF\" \"RVC\"                                
                                                                        \"FVG\" \"SDTS\" \"SIF\"                                
                                                                        \"SLF\" TIFF\" \"TGRLN\'                                
                                                                        \"VPT\" Free text                                       

  6.4.2.2               Digital Transfer      The means and media by    Lines 6.4.2.2.1-6.4.2.2.1.1.1.1 M              N        Compound
                        Option                which a data set is                                                               
                                              obtained from the                                                                 
                                              distributor                                                                       

  6.4.2.2.1             Online Option         Information required to   Lines                           M              1        Compound
                                              directly obtain the data  6.4.2.2.1.1-6.4.2.2.1.1.1.1                             
                                              set electronically                                                                

  6.4.2.2.1.1           Computer Contact      Instructions for          Lines                           M              N        Compound
                        Information           establishing              6.4.2.2.1.1.1-6.4.2.2.1.1.1.1                           
                                              communications with the                                                           
                                              distribution computer                                                             

  6.4.2.2.1.1.1         Network Address       The electronic address    Line 6.4.2.2.1.1.1.1            M              1        Compound
                                              from which the data set                                                           
                                              can be obtained from the                                                          
                                              distribution computer.                                                            

  6.4.2.2.1.1.1.1       Network Resource Name The name of the file or   Free text                       M              N        Text
                                              service from which the                                                            
                                              data set can be obtained                                                          

  6.4.3                 Fees                  The fees and terms for    Free text                       M              1        Text
                                              retrieving the data set                                                           

  7                     Metadata Reference    Information on the        Lines 7.1-7.6                   M              1        Compound
                        Information           currentness of the                                                                
                                              metadata information, and                                                         
                                              the responsible party                                                             

  7.1                   Metadata Date         The date that the         free date                       M              1        Date
                                              metadata were created or                                                          
                                              last updated                                                                      

  7.2                   Metadata Review Date  The date of the latest    free date; Metadata Future      O              1        Date
                                              review of the metadata    Review Date later than Metadata                         
                                              entry                     Date                                                    

  7.4                   Metadata Contact      The party responsible for Line 10.0                       M              1        Compound
                                              the metadata information                                                          

  7.5                   Metadata Standard     The name of the metadata  \"FGDC Content Standard for     M              1        Text
                        Name                  standard used to document Digital Geospatial Metadata\"                           
                                              the data set              Free text                                               

  7.6                   Metadata Standard     Identification of the     Free text                       M              1        Text
                        Version               version of the metadata                                                           
                                              standard used to document                                                         
                                              the data set                                                                      

  8                     Citation Information  The recommended reference Lines 8.1-8.10                  M              1        Compound
                                              to be used for the data                                                           
                                              set (Note: this section                                                           
                                              provides a means of                                                               
                                              stating the citation of a                                                         
                                              data set, and is used by                                                          
                                              other sections of the                                                             
                                              metadata standard. This                                                           
                                              section is never used                                                             
                                              alone.)                                                                           

  8.1                   Originator            The name of the           \"Unknown\" Free text           M              N        Text
                                              organization or                                                                   
                                              individual that developed                                                         
                                              the data set. If the name                                                         
                                              of editors or compilers                                                           
                                              are provided, the name                                                            
                                              must be followed by                                                               
                                              \"(ed.)\" or \"(comp.)\"                                                          
                                              respectively                                                                      

  8.2                   Publication Date      The date when the data    \"Unknown\" \"Unpublished       M              1        Date
                                              set is published or       material\" free date                                    
                                              otherwise made available                                                          
                                              for release                                                                       

  8.4                   Title                 The name by which the     Free text                       M              1        Text
                                              data set is know                                                                  

  8.8                   Publication           Publication details for   Lines 8.81-8.82                 C if the data  1        Compound
                        Information           published data sets                                       set is                  
                                                                                                        published               

  8.8.1                 Publication Place     the name of the city (and Free text                       M              1        Text
                                              state or province, and                                                            
                                              country, if needed to                                                             
                                              identify the city) where                                                          
                                              the data set was                                                                  
                                              published or released                                                             

  8.8.2                 Publisher             the name of the           Free text                       M              1        Text
                                              individual or                                                                     
                                              organization that                                                                 
                                              published the data set                                                            

  8.1                   Online Linkage        The name of an online     Free text                       O              1        Text
                                              computer resource that                                                            
                                              contains the data set.                                                            
                                              Entries should follow the                                                         
                                              Uniform Resource Locator                                                          
                                              convention of the                                                                 
                                              Internet                                                                          

  9                     Time Period           Information about the     Lines 9.1-9.3.3                 M              1        Compound
                        Information           date and time of an                                                               
                                              event. (Note: this                                                                
                                              section provides a means                                                          
                                              of stating temporal                                                               
                                              information, and is used                                                          
                                              by other sections of the                                                          
                                              metadata standard. This                                                           
                                              sections is never used                                                            
                                              alone.)                                                                           

  9.1 OR 9.2 OR 9.3                                                     Lines 9.1.1 OR 9.1-9.1.1 OR     M (one loption           
                                                                        9.3.1-9.3.3                     must be                 
                                                                                                        selected)               

  9.1                   Single Date/Time      Means of encoding a       Line 9.1.1                      M              1        Compound
                                              single date and time                                                              

  9.1.1                 Calendar Date         The year (and optionally  \"Unknown\" free date           M              1        Date
                                              month, or month and day)                                                          

  9.2                   Multiple Dates/Times  Means of encoding         Lines 9.1-9.1.1                 M              N        Compound
                                              multiple individual dates                                                         
                                              and times                                                                         

  9.3                   Range of Dates/Times  Means of encoding a range Lines 9.3.1-9.3.3               M              1        Compound
                                              of dates and times                                                                

  9.3.1                 Beginning Date        The first year (and       \"Unknown\" free date           M              1        Date
                                              optionally month, or                                                              
                                              month and day) of the                                                             
                                              event                                                                             

  9.3.3                 Ending Date           The last year (and        \"Unknown\" free date           M              1        Date
                                              optionally month, or                                                              
                                              month and day) for the                                                            
                                              event                                                                             

  10                    Contact Information   Identity of, and means to Lines 10.1-10.8                 M              1        Compound
                                              communicate with,                                                                 
                                              person(s) and                                                                     
                                              organization(s)                                                                   
                                              associated with the data                                                          
                                              set (Note: this section                                                           
                                              provides a means of                                                               
                                              identifying individuals                                                           
                                              and organizations, and is                                                         
                                              used by other sections of                                                         
                                              the metadata standard.                                                            
                                              This section is never                                                             
                                              used alone.)                                                                      

  10.1 OR 10.2                                                          Lines 10.1.1-10.1.2 OR 10.1.2   M (one option            
                                                                                                        must be                 
                                                                                                        selected)               

  10.1                  Contact Person        The person, and the       Lines 10.1.1-10.1.2             M              1        Compound
                        Primary               affiliation of the                                                                
                                              person, associated with                                                           
                                              the data set. Used in                                                             
                                              cases where the                                                                   
                                              association of the person                                                         
                                              to the data set is more                                                           
                                              significant than the                                                              
                                              association of the                                                                
                                              organization to the data                                                          
                                              set.                                                                              

  10.1.1                Contact Person        The name of the           Free text                       M              1        Text
                                              individual to which the                                                           
                                              contact type applies                                                              

  10.1.2                Contact Organization  The name of the           Free text                       O              1        Text
                                              organization to which the                                                         
                                              contact type applies                                                              

                                                                                                                                

  10.2                  Contact Organization  The organization, and the Line 10.1.2                     M              1        Compound
                        Primary               member of the                                                                     
                                              organization, associated                                                          
                                              with the data set. Used                                                           
                                              in cases where the                                                                
                                              association of the                                                                
                                              organization to the data                                                          
                                              set is more significant                                                           
                                              than the association of                                                           
                                              the person to the data                                                            
                                              set                                                                               

  10.1.2                Contact Organization  The name of the           Free text                       M              1        Text
                                              organization to which the                                                         
                                              contact type applies                                                              

  10.1.1                Contact Person        The name of the           Free text                       O              1        Text
                                              individual to which the                                                           
                                              contact type applies                                                              

  10.3                  Contact Position      The title of the          Free text                       O              1        Text
                                              individual                                                                        

  10.4                  Contact Address       The address for the       Lines 10.4.1-10.4.6             M              N        Compound
                                              organization or                                                                   
                                              individual                                                                        

  10.4.1                Address Type          The information provided  \"mailing\" \"physical\"        M              1        Text
                                              by the address            \"mailing and physical\", Free                          
                                                                        text                                                    

  10.4.2                Address               An address line for the   Free text                       C - if the     N        Text
                                              address                                                   contact                 
                                                                                                        address is              
                                                                                                        mailing type            

  10.4.3                City                  The city of the address   Free text                       M              1        Text

  10.4.4                State or Province     The state or province of  Free text                       M              1        Text
                                              the address                                                                       

  10.4.5                Postal Code           The ZIP or other postal   Free text                       M              1        Text
                                              code of the address                                                               

  10.4.6                Country               The country of the        Free text                       O              1        Text
                                              address                                                                           

  10.5                  Contact Voice         The telephone number by   Free text                       M              N        Text
                        Telephone             which individuals can                                                             
                                              speak to the organization                                                         
                                              or individual                                                                     

  10.7                  Contact Facsimile     The telephone number of a Free text                       O              N        Text
                        Telephone             facsimile machine of the                                                          
                                              organization or                                                                   
                                              individual                                                                        

  10.8                  Contact Electronic    The address of the        Free text                       O              N        Text
                        Mail Address          electronic mailbox of the                                                         
                                              organization or                                                                   
                                              individual                                                                        
  --------------------- --------------------- ------------------------- ------------------------------- -------------- -------- ----------

**Annex G**

**(informative)**

**Diagram of governmental unit boundary description component
characteristics**

Annex G (informative) is a graphic depiction of the organization and
hierarchy of data elements and compound elements that define the
information content for a GU boundary. All compound elements are
described by data elements; data elements are the primitive items of
data.

GU Boundary Description Components, or GU Information, are presented in
three sections: References, GU Type Information and GU Instance
Information. Subsections within each section contain the compound
elements and data elements, each of which have six distinct
characteristics as defined in 7.2: name, definition, domain values,
obligation/condition, maximum occurrence and data type.

This annex illustrates the GU Information nonspecifically, by name,
obligation, and maximum occurrence. The format for GU description begins
with the most generalized compound element and moves inward towards the
more specific data elements. Both compound elements and data elements
may be excluded if the obligation/condition is optional, or the
conditions specified for the element are not met. Annex G is to be used
in conjunction with Annex H (informative), the tabular depiction of the
boundary description components. The numbers in the lower right corner
of the data element depiction refers to its line number in Annex H.
Repeatable refers to the possible multiple occurrence of the element,
described as maximum occurrence in Annex H.

Figure G.1

![](media/image2.wmf){width="6.0in" height="8.5in"}

Figure G.2

![](media/image3.wmf){width="6.0in" height="8.752083333333333in"}

![](media/image3.wmf){width="6.0in" height="9.0in"} Figure G.3

Figure G.4

![](media/image4.wmf){width="6.0in" height="9.0in"}

Figure G.5

**Annex H**

**(informative)**

**Table of governmental unit boundary description component
characteristics**

Annex H (informative) describes the requisite information necessary to
exchange GU and other legal entity boundary data. Definitions for the
terminology describing the characteristics of the data are provided in
7.2.

To implement Annex H, one shall follow the Line numbers in sequence and
consult the Obligation/Condition (O/C) to determine if the component is
mandatory (M), conditional (C) and its conditions are met, or if it is
optional (O). Once it is determined that the component is required for
GU boundary documentation through its definition and
obligation/condition, one shall refer to the domain which describes the
valid values that can be assigned to the data element. If the component
is a compound element, the domain will specify the lines of data
elements to include. If the component is a compound element, the line
will be grey, the domain will specify the appropriate lines for the
component, and the data type will specify \'compound\'. For data
elements the characteristic \"data type\" describes the kind of value to
be provided, e.g. integer, real, text. The maximum occurrence (MO) will
specify if the element shall only be recorded one time (1) or if the
element is repeatable from one to many times (N).

  ------------- ---------------- ------------------------ --------------------- --------------- -------- -----------
  **Line \#**   **Name**         **Definition/Content**   **Domain**            **O/C**         **MO**   **Data
                                                                                                         Type**

  1.0           References       Relevant documentation   Lines 1.1 - 1.2.4     M               1        Compound
                                 to the GU dataset                                                       

  1.1           Metadata         Documentation that       Line 1.1.1            M               1        Compound
                                 describes the content,                                                  
                                 quality, condition, and                                                 
                                 other characteristics of                                                
                                 data                                                                    

  1.1.1         File Level FGDC  Metadata information for Annex D               M               1        Text/Real
                Metadata         the GU dataset as                                                       
                                 determined in the                                                       
                                 Standard                                                                

  1.2           Other Standards/ Standards and other      Lines 1.2.1 - 1.2.5   C-if other      N        Compound
                Documents        relevant documents                             standards or             
                                 referenced when                                documents are            
                                 documenting the GU                             used in GU               
                                 dataset                                        boundary                 
                                                                                documentation            

  1.2.1         Document Type    Description of the type  Standard, Document,   M               1        Text
                                 of document referenced   Free Text                                      

  1.2.2         Document Name    Name of document         Free Text             M               1        Text
                                 referenced                                                              

  1.2.3         Document Date    Date of document         Free Date             C - if date is  1        Real
                                 referenced                                     known                    

  1.2.4         Document Version Version number of        Free text             C - if version  1        Text
                                 document referenced                            is known                 

  2.0           GU Type          Information describing   Lines 1.1 - 1.3.1     M               1        Compound
                Information      the type of GU whose                                                    
                                 data are being described                                                

  2.1           GU Type          Specific identification  Lines 1.1.1 -1.1.4    M               1        Compound
                Identification   information describing                                                  
                                 the type of GU whose                                                    
                                 data are being described                                                

  2.1.1         GU Type Name     The designated name for  Terms in Section      M               1        Text
                                 the type of GU whose     4.1.1, Annex E, Annex                          
                                 data are being described F, Free Text                                   

  2.1.2         GU Type Name     The abbreviated name for Free Text             C - if an       1        Text
                Abbreviation     the type of GU whose                           abbreviation             
                                 data are being described                       exists for GU            
                                                                                Type Name                

  2.1.3         GU Type          Definition of the type   Definitions in        C - if the GU   1        Text
                Definition       of GU whose data are     Section 4.1.1, Annex  Type Name and            
                                 being described          E, Free Text          GU Type                  
                                                                                Definition are           
                                                                                known                    

  2.1.4         GU Coding System The coding system which  Lines 2.1.4.1 -       C - if a coding 1        Compound
                                 identifies the GU being  2.1.4.2               system exists            
                                 described                                                               

  2.1.4.1       GU Type Code     The specific code which  Free Number           C - if a type   N        Text/Real
                                 identifies the GU being                        code exists              
                                 described                                                               

  2.1.4.2       GU Coding System GU Type Code reference   FIPS Code, Free Text, M               1        Text/Real
                Reference        documentation            Free Number                                    

  2.2           GU Type          Information describing   Lines 2.2.1 - 2.2.2.3 C - if one or   1        Compound
                Relationship     one or more                                    more type                
                                 relationships the GU                           relationships            
                                 being described shares                         exist                    
                                 with other GUs                                                          

  2.2.1         GU Maintenance   Common areal information Lines 2.2.1.1 -       C - if one or   N        Compound
                Relationships    between one or more GUs  2.2.1.2               more                     
                                 or legal entities and                          maintenance              
                                 geographic area features                       relationships            
                                                                                exist for the            
                                                                                GU being                 
                                                                                documented               

  2.2.1.1       Maintenance List List of maintenance      Free Text             C - if a        N        Text
                                 relationships for the GU                       maintenance              
                                 type being described                           list exists              

  2.2.1.2       Maintenance List The maintenance          Free Text             M               N        Text
                Reference        relationship list                                                       
                                 reference document                                                      

  2.2.2         GU Topologic     Conditional or           Lines 2.2.2.1 -       C - if one or   1        Compound
                Relationships    characteristic           2.2.2.3               more topologic           
                                 relationships that apply                       relationships            
                                 to GUs and legal                               exist for the            
                                 entities                                       GU being                 
                                                                                documented               

  2.2.2.1       Contiguous       List of GUs or feature   Free Text             C - if one or   N        Text
                Relationship     objects that are either                        more contiguous          
                List             adjacent to one another,                       relationships            
                                 touch at a common point,                       exist                    
                                 or share a boundary                                                     

  2.2.2.2       Composed of      List of GUs or feature   Free Text             C - if one or   N        Text
                Relationship     objects that constitute                        more composed            
                List             the GU being documented                        of                       
                                                                                relationships            
                                                                                exist                    

  2.2.2.3       Composes         List of GUs of which the Free Text             C - if one or   N        Text
                Relationship     GU being documented                            more composes            
                List             always forms a part                            relationships            
                                                                                exist                    

  3.0           GU Instance       Single representation   Lines 3.1 - 3.2.3.3   M                N       Compound
                                 of a GU feature                                                         

  3.1           GU Instance      Information describing   Lines 3.1.1 - 3.2.2.3 M               N        Compound
                Information      the single                                                              
                                 representation of the                                                   
                                 feature type, or                                                        
                                 specific GU documented                                                  

  3.1.1         GU Instance      Identification of the    Lines 3.1.1.1 -       M               1        Compound
                Identification   single representation of 3.1.6.2                                        
                                 the feature type, or                                                    
                                 specific GU described                                                   

  3.1.1.1       GU Instance Name Name of the GU instance  Free Text             M               1        Text

  3.1.1.2       GU Type Name     Reference to the GU type Line 2.1.1            M               1        Text
                Reference        name                                                                    

  3.1.1.3       Functional       Administrative or legal  nonfunctioning,       C - if          1        Text
                Status           activities associated    active, inactive      functional               
                                 with performing the                            status is known          
                                 legally prescribed                                                      
                                 functions of a                                                          
                                 governmental unit                                                       

  3.1.1.4       GU Instance      Specific identifier      Lines 3.1.1.4.1 -     M               1        Compound
                Boundary ID      assigned to a GU         3.1.4.2                                        
                                 boundary instance                                                       

  3.1.1.4.1     Polygon ID       Unique identifier        Free text, Free       C - if boundary 1        Text/Real
                                 assigned to the boundary number                is expressed as          
                                 polygon                                        a polygon                

  3.1.1.4.2     CurveSegID       Unique identifier        Free text, Free       C - if boundary 1        Text/Real
                                 assigned to the boundary number                is expressed as          
                                 curve segment                                  curve segments           

  3.1.1.5       Legal Area       Description of the legal Free text             C - if legal    1        Text
                Description      area, a geographic area                        area                     
                                 whose boundaries, name,                        description is           
                                 origin, and                                    known                    
                                 legal/statistical area                                                  
                                 description result from                                                 
                                 charters, laws,                                                         
                                 treaties, or other                                                      
                                 administrative or                                                       
                                 governmental action                                                     

  3.1.1.5.1     County           County as defined in     Free text             C - if the GU   1        Text
                                 Annex E                                        being                    
                                                                                documented is a          
                                                                                county                   

  3.1.1.5.2     City/ Town/      City, Town, and Village, Free text             C - if the GU   1        Text
                Village          as defined in Annex E                          being                    
                                                                                documented is a          
                                                                                city, town, or           
                                                                                village                  

  3.1.1.5.3     Other Locality   Those locations that are Free text             C - if the GU   1        Text
                Name             not County, City, Town,                        being described          
                                 or Village, as defined                         is not a                 
                                 in Annex E or other                            county, city,            
                                 locality name                                  town, or                 
                                                                                village                  

  3.1.1.6       GU Code           Information describing  Lines 3.1.1.6.1 -     C- if a GU code 1        Compound
                Information      GU Type Code and GU      3.1.1.6.2             exists                   
                                 Instance Code                                                           

  3.1.1.6.1     GU Instance Code Specific code which      Free text, Free       C - if an       1        Text/Real
                                 identifies the GU        number                instance code            
                                 instance being described                       exists                   

  3.1.1.6.2     GU Coding System GU Type Code reference   Line 2.1.4.2          M               1        Compound
                Reference                                                                                

  3.1.1.7       Boundary         A term or phrase which   Free text             C - if one or   N        Text
                Classifier       describes the status of                        more boundary            
                                 the boundary                                   classifiers              
                                                                                exist                    

  3.1.2         GU Instance      Information about one or Lines 3.1.2.1 -       M               N        Compound
                Relationship     more relationships the   3.1.2.2.3                                      
                                 GU being described                                                      
                                 shares with other GUs                                                   

  3.1.2.1       GU Instance      Common areal information Lines 3.1.2.1.1 -     C - if one or   N        Compound
                Maintenance      between the described GU 3.1.2.2.3             more                     
                Relationships    entity and geographic                          maintenance              
                                 area features                                  relationships            
                                                                                exist                    

  3.1.2.1.1     Maintenance      Name of the referenced   Free Text             M               N        Text
                Relationship     maintenance relationship                                                
                Name                                                                                     

  3.1.2.2       GU Topologic     Conditional or           Lines                 C - if one or   N        Compound
                Relationships    characteristic           3.1.2.2.1-3.1.2.2.3   more                     
                                 relationships that apply                       topological              
                                 to the specific GUs                            relationships            
                                 being described                                exist                    

  3.1.2.2.1     Contiguous       List of GUs or feature   Line 2.2.2.1, free    C - if one or   N        Text
                Relationship     objects that are either  text                  more contiguous          
                List             adjacent to one another,                       relationships            
                                 touch at a common point,                       exist                    
                                 or share a boundary                                                     

  3.1.2.2.2     Composed of      List of GUs or feature   Line 2.2.2.2, free    C - if one or   N        Text
                Relationship     objects that constitute  text                  more composed            
                List             the GU being documented                        of                       
                                                                                relationships            
                                                                                exist                    

  3.1.2.2.3     Composes         List of GUs of which the Line 2.2.2.3, free    C - if one or   N        Text
                Relationship     GU being documented      text                  more composes            
                List             always forms a part                            relationships            
                                                                                exist                    

  3.2           Boundary         Information describing   Lines 3.2.1-3.2.3.3   M               N        Compound
                Instance         the specific GU boundary                                                
                Coordinate       being described                                                         
                Information                                                                              

  3.2.1         Polygon          Set of line segments     Lines 3.2.1.1-3.2.1.3 C-if the        N        Compound
                                 that define a GU                               delineation of           
                                 boundary being described                       the GU boundary          
                                                                                file consists            
                                                                                of polygons              

  3.2.1.1       Polygon ID       Identification for the   Free Text, Free       M               1        Text/Real
                                 polygon                  Number                                         

  3.2.1.2       Single Curve     Set of coordinates with  Lines 3.2.1.2.1 -     C - if the      N        Compound
                Coordinate Set   no repetition that       3.2.1.2.3.1           polygon                  
                                 define a curve                                 consists of a            
                                                                                single curve             

  3.2.1.2.1     Start Point      First point of a curve   Line 3.2.1.2.1.1      M               1        Compound

  3.2.1.2.1.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.1.2.2     End Point        Last point of a curve    Line 3.2.1.2.2.1      M               1        Compound

  3.2.1.2.2.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.1.2.3     Intermediate     Point on a curve         Line 3.2.1.2.3.1      C - if one or   N        Compound
                Point                                                           more                     
                                                                                intermediate             
                                                                                points exist             

  3.2.1.2.3.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.1.3       Multiple Curves  Collection of            Lines 3.2.1.3.1 -     C-if the        N        Compound
                Coordinate Set   coordinates with no      3.2.1.3.3.1           polygon                  
                                 repetition that define                         consists of              
                                 more than one curve                            multiple curves          

  3.2.1.3.1     Start Point      First point of a curve   Line 3.2.1.3.1.1      M               1        Compound

  3.2.1.3.1.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.1.3.2     End Point        Last point of a curve    Line 3.2.1.3.2.1      M               1        Compound

  3.2.1.3.2.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.1.3.3     Intermediate     Point on a curve         Line 3.2.1.3.3.1      C - if one or   N        Compound
                Point                                                           more                     
                                                                                intermediate             
                                                                                points exist             

  3.2.1.3.3.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.2         Curve Segment    Homogenous segment of a  Lines 3.2.2.1         C - if the GU   N        Compound
                                 curve                    -3.2.2.2.3.1          consists of              
                                                                                curve segments           

  3.2.2.1       CurveSegID       Identification of the    Free Text, Free       M               1        Text/Real
                                 curve segment            Number                                         

  3.2.2.2       Curve Segment    Sequences of numbers     Lines 3.2.1.2.1 -     M               N        Real
                Coordinate Set   designating the          3.2.2.2.3.1                                    
                                 positions of points                                                     

  3.2.2.2.1     Start Point      First point of a curve   Line 3.2.2.2.1.1      M               1        Compound

  3.2.2.2.1.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.2.2.2     End Point        Last point of a curve    Line 3.2.2.2.2.1      M               1        Compound

  3.2.2.2.2.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.2.2.3     Intermediate     Point on a curve         Line 3.2.2.2.3.1      C - if one or   N        Compound
                Point                                                           more                     
                                                                                intermediate             
                                                                                points exist             

  3.2.2.2.3.1   Coordinates      Sequence of numbers      Line 3.2.3            M               1        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.3         Coordinates      Sequence of numbers      Lines 3.2.3.1-3.2.3.3 M               N        Compound
                                 designating the position                                                
                                 of a point                                                              

  3.2.3.1       X                Latitude Coordinate      Free Number           M               1        Real

  3.2.3.2       Y                Longitude Coordinate     Free Number           M               1        Real

  3.2.3.3       Z                Altitude Coordinate      Free Number           O               1        Real
  ------------- ---------------- ------------------------ --------------------- --------------- -------- -----------

**Annex I**

**(informative)**

**Referenced publications**

U.S. Government. Office of Management and Budget. *Circular A-16*. 2002.