xxxx-**Part.5**

Date: 2008-03-18

Information Technology -- Geographic Information

Framework Data Content Standard

Part 5: Governmental unit and other geographic area boundaries

Contents

[Introduction v](#__RefHeading___Toc193613710)

[1 Scope 1](#scope)

[2 Normative references 1](#normative-references)

[3 Standards development 1](#standards-development)

[4 Maintenance authority 2](#maintenance-authority)

[4.1 Level of responsibility 2](#level-of-responsibility)

[4.2 Contact information 2](#contact-information)

[5 Terms and definitions 2](#terms-and-definitions)

[6 Content model 5](#content-model)

[6.1 Geographic area feature 5](#geographic-area-feature)

[6.2 Geographic area boundaries 5](#geographic-area-boundaries)

[6.3 Geographic area relationships 5](#geographic-area-relationships)

[6.3.1 Maintenance relationships 5](#maintenance-relationships)

[6.3.2 Spatial relationships 7](#spatial-relationships)

[7 UML model 10](#uml-model)

[8 Data dictionary 11](#data-dictionary)

[8.1 GovtUnits 11](#govtunits)

[8.2 GeographicArea 11](#geographicarea)

[8.3 GovernmentalUnit 13](#governmentalunit)

[8.4 AdministrativeUnit 14](#administrativeunit)

[8.5 StatisticalUnit 15](#statisticalunit)

[8.6 OtherUnit 16](#otherunit)

[8.7 Boundary 16](#boundary)

[8.8 MaintenanceRelationship 18](#maintenancerelationship)

[8.9 SpatialRelationship 18](#spatialrelationship)

[8.10 BoundaryClassifier 19](#boundaryclassifier)

[8.11 Code lists and enumerations 20](#code-lists-and-enumerations)

[8.11.1 Code lists 21](#code-lists)

[8.11.2 SpatialRelationshipList enumeration
29](#spatialrelationshiplist-enumeration)

[Annex A (informative) Sample map extraction and associated attribute
table 31](#__RefHeading___Toc193613739)

Figures

[Figure 1 -- UML model 10](#__RefHeading___Toc149465868)

[Figure 2 -- Code lists and enumerations
20](#__RefHeading___Toc149465869)

[Figure A.1 -- Sample map 31](#__RefHeading___Toc149465879)

Tables

[Table 1 -- Data dictionary for GovtUnits
11](#__RefHeading___Toc193613747)

[Table 2 -- Data dictionary for GeographicArea
11](#__RefHeading___Toc193613748)

[Table 3 -- Data dictionary for GovernmentalUnit
13](#__RefHeading___Toc193613749)

[Table 4 -- Data dictionary for AdministrativeUnit
14](#__RefHeading___Toc193613750)

[Table 5 -- Data dictionary for StatisticalUnit
15](#__RefHeading___Toc193613751)

[Table 6 -- Data dictionary for OtherUnit
16](#__RefHeading___Toc193613752)

[Table 7 -- Data dictionary for Boundary
17](#__RefHeading___Toc193613753)

[Table 8 -- Data dictionary for MaintenanceRelationship
18](#__RefHeading___Toc193613754)

[Table 9 -- Data dictionary for SpatialRelationship
19](#__RefHeading___Toc193613755)

[Table 10 -- Data dictionary for BoundaryClassifier
19](#__RefHeading___Toc193613756)

[Table 11 -- CodeList for AdministrativeUnitType
21](#__RefHeading___Toc193613757)

[Table 12 -- CodeList for DeterminationType
23](#__RefHeading___Toc193613758)

[Table 13 -- CodeList for GovernmentalUnitType
23](#__RefHeading___Toc193613759)

[Table 14 -- CodeList for SpatialChangeType
25](#__RefHeading___Toc193613760)

[Table 15 -- CodeList for StatisticalUnitType
26](#__RefHeading___Toc193613761)

[Table 16 -- SpatialRelationshipList enumeration
30](#__RefHeading___Toc193613762)

[Table A.1 -- Sample associated attribute table
32](#__RefHeading___Toc193613763)

[Table A.2 -- Sample spatial relationships
33](#__RefHeading___Toc193613764)

[Table A.3 -- Sample maintenance and change types
34](#__RefHeading___Toc193613765)

Foreword

Geographic information, also known as geospatial information, both
underlies and is the subject of much of the political, economic,
environmental, and security activities of the United States. In
recognition of this, the United States Office of Management and Budget
issued Circular A-16 (revised 2002), which established the Federal
Geographic Data Committee (FGDC) as a coordinating organization.

Work on this standard started under the Geospatial One-Stop e-Government
initiative. The standard was developed with the support of the member
agencies and organizations of the FGDC and aids in fulfilling a primary
objective of the National Spatial Data Infrastructure (NSDI), that is,
creation of common geographic base data for seven critical data themes.
The seven core data themes are considered framework data of critical
importance to the spatial data infrastructure.

As the Geographic Information Framework Data Content Standard was
developed using public funds, the U.S. Government will be free to
publish and distribute its contents to the public, as provided through
the Freedom of Information Act (FOIA), Part 5 United States Code,
Section 552, as amended by Public Law No. 104-231, "Electronic Freedom
of Information Act Amendments of 1996".

[]{#__RefHeading___Toc193613710 .anchor}Introduction

The primary purpose of this part of the Geographic Information Framework
Data Content Standard is to support the exchange of governmental unit
and other geographic area boundary data. This part seeks to establish a
common baseline for the semantic content of governmental unit and other
geographic area boundary databases for public agencies and private
enterprises. It also seeks to decrease the costs and simplify the
exchange of governmental unit and other geographic area boundary data
among local, Tribal, State, and Federal users and producers. That, in
turn, discourages duplicative data collection. Benefits of adopting this
part of the standard also include the long-term improvement of the
geospatial governmental unit and other geographic area boundary data
within the community.

Framework Data Content Standard -- Governmental unit and other
geographic area boundaries

# Scope {#scope .Heading-H1-clause-with-title}

> The purpose of the Geographic Information Framework Data Content
> Standard, Part 5: Governmental Unit and Other Geographic Area
> Boundaries is to establish the content requirements for the collection
> and interchange of governmental units and other geographic area
> boundary data and to facilitate the maintenance and use of that
> information.
>
> This part identifies and defines the terminology, encoding schema, and
> data components required to describe a geographic area and its
> boundary.
>
> This part applies to the following types of geographic areas:

-   Governmental units

-   Administrative units

-   Statistical units

-   Other units

> For the purposes of this part, these types of geographic areas are
> defined as follows:

-   A governmental unit is a geographic area with legally defined
    > boundaries established under Federal, Tribal, State, or local law,
    > and with the authority to elect or appoint officials and raise
    > revenues through taxes.

-   An administrative unit is a geographic area established by rule or
    > regulation of a legislative, executive, or judicial governmental
    > authority, a non-profit organization, or private industry for the
    > execution of some function.

-   A statistical unit is a geographic area defined for the collection,
    > tabulation, and/or publication of demographic, and/or other
    > statistical data.

-   Other units are those geographic areas that are not governmental
    > units, administrative units, or statistical units as defined
    > herein, and are not areas that are defined or described in other
    > framework parts.

> This part specifies the content and organization necessary for the
> successful interchange of geographic area boundary data. This part
> does not specify a particular structure for interchange of boundary
> data. Further, data producers and users may structure geographic area
> boundary data in any format for their internal use.

# Normative references {#normative-references .Heading-H1-clause-with-title}

> Annex A of the Base Document (Part 0) lists normative references
> applicable to two or more parts of the standard. Annex D of the Base
> Document lists informative references applicable to two or more of the
> parts. ANSI and ISO standards may be purchased through the ANSI
> eStandards Store at
> <http://webstore.ansi.org/ansidocstore/default.asp>, accessed October
> 2006.

# Standards development {#standards-development .Heading-H1-clause-with-title}

> The FGDC Subcommittee on Cultural and Demographic Data, sponsor of the
> Geographic Information Framework Data Content Standard, Part 5:
> Governmental Unit and Other Geographic Area Boundaries part, initiated
> the development of this document 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
> Infrastructures 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.

# Maintenance authority {#maintenance-authority .Heading-H1-clause-with-title}

## Level of responsibility {#level-of-responsibility .Heading-H2-Subclause-with-title}

> The FGDC is the responsible organization for coordinating work on all
> parts of the Geographic Information Framework Data Content Standard.
> The U.S. Census Bureau on behalf of the U.S. Department of Commerce,
> working with the FGDC, is directly responsible for development and
> maintenance of the Geographic Information Framework Data Content
> Standard, Part 5: Governmental Unit and Other Geographic Area
> Boundaries.

## Contact information {#contact-information .Heading-H2-Subclause-with-title}

> Address questions concerning this part of the standard to:
>
> Federal Geographic Data Committee Secretariat\
> c/o U.S. Geological Survey\
> 590 National Center\
> Reston, Virginia 20192 USA
>
> Telephone: (703) 648-5514\
> Facsimile: (703) 648-5755\
> Internet (electronic mail): [gdc@fgdc.gov](../gdc@fgdc.gov)\
> WWW Home Page: [http://fgdc.gov](http://fgdc.gov/)
>
> Or
>
> Randy Fusaro\
> Chief, National Geographic Partnerships Team\
> U.S. Census Bureau\
> GEO 7400, 4700 Silver Hill Road, Washington, DC 20233-7400\
> <randy.j.fusaro@census.gov>

# Terms and definitions {#terms-and-definitions .Heading-H1-clause-with-title}

> Definitions applicable to the Governmental Unit and Other Geographic
> Area Boundaries part are listed below. More general terms and
> definitions can be found in the Base Document (Part 0). Users are
> advised to consult that part for a complete set of definitions.

5.1

administrative unit

area established by rule, treaty, or regulation of a legislative,
executive, or judicial governmental authority, a non-profit
organization, or private industry for the execution of some function

EXAMPLES American Indian Trust Land, Congressional District, Enterprise
Zone/Empowerment Community, State Legislative District

5.2

areal

two-dimensional

5.3

boundary

set that represents the limit of an entity \[ISO 19107\]

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

EXAMPLE The line that marks the limit of a geographic entity.

5.4

co-determined

changes to a **boundary** segment by either geographic area that shares
the **boundary** segment impose the same changes to the **boundary** of
another geographic area that shares the same **boundary** segment

5.5

contains

interior of one geographic area completely includes and encompasses the
interior and **boundary** of the other geographic area, so that their
**boundaries** do not intersect

NOTE This is the opposite and reciprocal condition to \"inside\".

5.6

covered by

interior of one geographic area is completely included in the interior
of the **boundary** of the other geographic area and their
**boundaries** intersect

NOTE This is the opposite and reciprocal condition to \"covers\".

5.7

covers

interior and **boundary** of one geographic area completely includes the
interior of the other geographic area and their **boundaries** intersect

NOTE This is the opposite and reciprocal condition to \"covered by\".

5.8

determined by

changes to a **boundary** segment by another geographic area require the
same changes to the **boundary** of a particular geographic area that
shares the same **boundary** segment.

NOTE This is the opposite of and potential reciprocal condition to
\"determines\".

5.9

determines

changes to a **boundary** segment by one geographic area require the
same changes to the **boundary** of another geographic area that shares
the **boundary** segment

NOTE This is the opposite of and potential reciprocal condition to
\"determined by\".

5.10

disjoint

**boundaries** and interiors of two geographic areas do not intersect

5.11

equal

two geographic areas have the same **boundary** and interior

5.12

governmental unit

geographic area with legally defined **boundaries** established under
Federal, Tribal, State, or local law, and with the authority to elect or
appoint officials and raise revenues through taxes

EXAMPLES American Indian Reservation, City, School District, Village

5.13

independent of

changes to a **boundary** segment by one geographic area creates a new,
unshared **boundary** segment in the **boundary** of that geographic
area, and impose no changes to the **boundary** of another geographic
area that shared the **boundary** segment by coincidence

5.14

inside

interior and **boundary** of one geographic area is completely included
in the interior of the other geographic area, so that their
**boundaries** do not intersect

NOTE This is the opposite and reciprocal condition to "contains\".

5.15

instance

one real world occurrence of a particular **type**

5.16

maintenance relationship

relative dependency between two or more geographic areas for maintaining
common **boundary** or area information

5.17

other unit

geographic area that is not a **governmental unit**, **administrative
unit**, or **statistical unit**, as defined herein, and that is not an
area defined or described in other framework parts

5.18

overlap

**boundaries** and interiors of two geographic areas intersect

5.19

spatial relationship

relative spatial location of a geographic area in terms of one or more
geographic areas

5.20

statistical unit

geographic area defined for the collection, tabulation, and/or
publication of demographic, and/or other statistical data

EXAMPLES Census Block, Metropolitan Area, Rural-Urban Commuting Area,
Unorganized Territory, ZIP Code Tabulation Area

5.21

touch

**boundaries** of two geographic areas intersect but the interiors do
not intersect

5.22

type

class of real world occurrences with common characteristics

# Content model {#content-model .Heading-H1-clause-with-title}

> The content model for geographic area boundary data documented in the
> following subsections and codified in the UML diagram and data
> dictionary sections below includes geographic area features,
> geographic area boundary features, and geographic area relationships.

## Geographic area feature {#geographic-area-feature .Heading-H2-Subclause-with-title}

> Data representing a geographic area feature instance shall provide
> complete identification of a geographic area, and its type.
> Governmental units, administrative units, and statistical units each
> relate to an associated code list consisting of known units of that
> type and the definition of the known units. For geographic areas not
> enumerated in the code lists or for those geographic areas of type
> other units, a unit type and type definition shall be documented. Each
> geographic area shall have an instance name, or the name of the
> specific geographic area being documented, and an instance code
> identifying the instance.

## Geographic area boundaries {#geographic-area-boundaries .Heading-H2-Subclause-with-title}

> Data representing the boundary of a geographic area feature shall be
> provided as complete polygon geometry attributes of the geographic
> area feature, or as a set of boundary features with curve geometries,
> or both. If both are provided, then either the curve geometries of the
> boundary features shall be identical to segments of the polygon
> geometries, or the differences shall be documented in
> boundaryClassifier attributes of the boundary features.

## Geographic area relationships {#geographic-area-relationships .Heading-H2-Subclause-with-title}

> Optional data may be provided to represent maintenance relationships
> and spatial relationships between two or more geographic areas and
> their boundaries.

### Maintenance relationships {#maintenance-relationships .Heading-H3-Subclause-with-title}

> A maintenance relationship exists when there is a relative dependency
> between two or more geographic areas for maintaining common boundary
> or area information.
>
> Each maintenance relationship may have a "controlsChangesTo" role with
> respect to associated boundary features where changes are in a
> "changeControlledBy" role with respect to the maintenance
> relationship. The absence of specified associated boundary features
> for a maintenance relationship shall be interpreted to mean that all
> boundary components and/or area shared by the geographic areas in the
> maintenance relationship are controlled by the maintenance
> relationship.
>
> Each maintenance relationship is an association between one geographic
> area feature in a "fromUnit" role and one or more geographic area
> features in a "toUnit" role. These roles in a maintenance relationship
> map the causality of a determination type for a specific spatial type
> of boundary change.
>
> Multiple maintenance relationships with different determination types
> and spatial change types may be required to represent all of the
> dependencies between two geographic area features. For example, one
> geographic area may determine changes to the boundary of another when
> it expands, but not when it contracts.

#### Determination types {#determination-types .Heading-H4-Subclause-with-title}

> Determination types specify how changes to a shared boundary by one
> geographic area feature member of a maintenance relationship affect
> that boundary from the perspective of the other geographic area
> feature member of the relationship.

##### Determines {#determines .Heading-H5-Subclause-with-title}

> Changes to a boundary segment by one geographic area require the same
> changes to the boundary of another geographic area that shares the
> boundary segment.
>
> When A expands along the shared boundary with B, A determines B.

##### Determined by {#determined-by .Heading-H5-Subclause-with-title}

> Changes to a boundary segment by another geographic area require the
> same changes to the boundary of a particular geographic area that
> shares the same boundary segment. This is the opposite of and
> potential reciprocal condition to \"Determines\".
>
> When A expands along the shared boundary with B, B is determined by A.

##### Co-determined {#co-determined .Heading-H5-Subclause-with-title}

> Changes to a boundary segment by either geographic area that shares
> the boundary segment imposes the same changes to the boundary of
> another geographic area that shares the same boundary segment.
>
> When C expands along the shared boundary with A and the shared
> boundary with B, it co-determines the boundaries of A and B.

##### Independent of {#independent-of .Heading-H5-Subclause-with-title}

> Changes to a boundary segment by one geographic area creates a new,
> unshared boundary segment in the boundary of that geographic area, and
> impose no changes to the boundary of another geographic area that
> shared the boundary segment by coincidence.
>
> When B contracts along a shared boundary with A and A is independent
> of B, then a new geographic area and boundary segments must be created
> to replace them (C).

#### Spatial change type {#spatial-change-type .Heading-H4-Subclause-with-title}

> A spatial change type specifies the type of change to a shared
> boundary by one geographic area feature member of a maintenance
> relationship that affects that boundary from the perspective of the
> other geographic area feature member of the relationship.

##### Expansion {#expansion .Heading-H5-Subclause-with-title}

> Increase in the area of a geographic area caused by a legal or
> administrative change in the definition of its boundary, for example,
> by annexation of adjacent territory.
>
> A expands.

##### Contraction {#contraction .Heading-H5-Subclause-with-title}

> Decrease in the area of a geographic area caused by a legal or
> administrative change in the definition of its boundary, for example,
> by de-annexation of adjacent territory.
>
> A contracts.

##### Reshape {#reshape .Heading-H5-Subclause-with-title}

> Change in the digital representation of the boundary of a geographic
> area to correspond to a more accurate or current survey information,
> where there has been no change to the official definition of the
> boundary.
>
> A reshapes.

##### All {#all .Heading-H5-Subclause-with-title}

> All changes to boundaries, whether due to expansion, contraction, or
> reshape.

### Spatial relationships {#spatial-relationships .Heading-H3-Subclause-with-title}

> Spatial relationships describe the relative spatial location of two
> geographic area features and their boundaries.
>
> Each spatial relationship is an association between one geographic
> area feature in a "fromUnit" role and one or more geographic area
> features in a "toUnit" role. These roles are asymmetric and reciprocal
> for the contains / inside and covers / covered by spatial relationship
> types. They are symmetric and identical for the overlap, touch, equal,
> and disjoint spatial relationship types.

#### Spatial relationship types {#spatial-relationship-types .Heading-H4-Subclause-with-title}

> For the purposes of this part, spatial relationship types are
> enumerated and defined as follows.

##### Contains {#contains .Heading-H5-Subclause-with-title}

> The interior of one geographic area completely includes and
> encompasses the interior and boundary of the other geographic area, so
> that their boundaries do not intersect.
>
> A contains B.

##### Inside {#inside .Heading-H5-Subclause-with-title}

> The interior and boundary of one geographic area are completely
> included in the interior of the other geographic area, so that their
> boundaries do not intersect. This is the opposite of and reciprocal
> condition to contains.
>
> B is inside A.

##### Covers {#covers .Heading-H5-Subclause-with-title}

> The interior and boundary of one geographic area completely include
> the interior of the other geographic area and their boundaries
> intersect.
>
> A covers B.

##### Covered by {#covered-by .Heading-H5-Subclause-with-title}

> The interior of one geographic area is completely included in the
> interior or the boundary of the other geographic area and their
> boundaries intersect. This is the opposite of and reciprocal condition
> to covers.
>
> B is covered by A.

##### Overlap {#overlap .Heading-H5-Subclause-with-title}

> The boundaries and interiors of the two geographic areas intersect.
>
> A overlaps B and B overlaps A.

##### Touch {#touch .Heading-H5-Subclause-with-title}

> The boundaries of two geographic areas intersect but the interiors do
> not intersect.
>
> A touches B and B touches A.

##### Equal {#equal .Heading-H5-Subclause-with-title}

> The two geographic areas have the same boundary and interior.
>
> A equals B and B equals A.

##### Disjoint {#disjoint .Heading-H5-Subclause-with-title}

> The boundaries and interiors of two geographic areas do not intersect.
>
> A is disjoint with B and B is disjoint with A.

# UML model {#uml-model .Heading-H1-clause-with-title}

![](media/image1.png){width="7.831944444444445in"
height="4.881944444444445in"}

[]{#__RefHeading___Toc149465868 .anchor}Figure 1 -- UML model

# Data dictionary {#data-dictionary .Heading-H1-clause-with-title}

> The data dictionary provides all entity and attribute definitions,
> domains, obligations/conditions, maximum occurrences and data types
> for elements depicted in the UML model.

## GovtUnits {#govtunits .Heading-H2-Subclause-with-title}

[]{#__RefHeading___Toc193613747 .anchor}Table 1 -- Data dictionary for
GovtUnits

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | D       | Domain   |
| ne | Name        |              | gati | imum | ataType |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 1. | GovtUnits   |              |      |      | \       | Line 2   |
|    |             |              |      |      | <\<Feat |          |
|    |             |              |      |      | ure\>\> |          |
+----+-------------+--------------+------+------+---------+----------+
| 2. | metadata    | Structured   | M    | 1    | C       | May be   |
|    |             | or           |      |      | haracte | text or  |
|    |             | unstructured |      |      | rString | st       |
|    |             | metadata as  |      |      |         | ructured |
|    |             | defined by   |      |      |         | metadata |
|    |             | the          |      |      |         | fragment |
|    |             | community of |      |      |         | or URI   |
|    |             | practice     |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## GeographicArea {#geographicarea .Heading-H2-Subclause-with-title}

> GeographicArea is an abstract class that captures the information
> about the type of the geographic area being described and the name,
> attribute information, and geometry about the specific instance being
> described. GeographicArea can optionally be bounded by boundary
> features that may or may not fully enclose the area. GovernmentalUnit,
> AdministrativeUnit, StatisticalUnit, and OtherUnit are specialized,
> non-abstract subclasses derived from GeographicArea to capture
> type-specific information. Each of these unit classes is a
> GeographicArea. Two or more GeographicAreas may have one or more
> SpatialRelationships and/or MaintenanceRelationships.

[]{#__RefHeading___Toc193613748 .anchor}Table 2 -- Data dictionary for
GeographicArea

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | D       | Domain   |
| ne | Name        |              | gati | imum | ataType |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 3. | Geo         | Class that   |      |      | \       | Lines    |
|    | graphicArea | captures     |      |      | <\<Feat | 4-18     |
|    |             | information  |      |      | ure\>\> |          |
|    |             | about the    |      |      |         |          |
|    |             | type of      |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area being   |      |      |         |          |
|    |             | described    |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 4. | unitId      | Identifier   | M    | 1    | \<\     | Unre     |
|    |             | assigned to  |      |      | <DataTy | stricted |
|    |             | the          |      |      | pe\>\>\ |          |
|    |             | governmental |      |      | Framewo |          |
|    |             | unit,        |      |      | rk::Ide |          |
|    |             | ad           |      |      | ntifier |          |
|    |             | ministrative |      |      |         |          |
|    |             | unit,        |      |      |         |          |
|    |             | statistical  |      |      |         |          |
|    |             | unit, or     |      |      |         |          |
|    |             | other unit   |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 5. | typeA       | Type code or | O    | 1    | C       | Unre     |
|    | bbreviation | abbreviation |      |      | haracte | stricted |
|    |             | for the      |      |      | rString |          |
|    |             | feature unit |      |      |         |          |
|    |             | type         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 6. | i           | \"Official\" | M    | 1    | C       | Unre     |
|    | nstanceName | feature      |      |      | haracte | stricted |
|    |             | name. If     |      |      | rString |          |
|    |             | available,   |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | instanceName |      |      |         |          |
|    |             | is the name  |      |      |         |          |
|    |             | of the       |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area feature |      |      |         |          |
|    |             | from the     |      |      |         |          |
|    |             | Geographic   |      |      |         |          |
|    |             | Names        |      |      |         |          |
|    |             | Information  |      |      |         |          |
|    |             | System       |      |      |         |          |
|    |             | (GNIS)       |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 7. | i           | \"U          | O    | \*   | C       | Unre     |
|    | nstanceAlte | nofficial\", |      |      | haracte | stricted |
|    | rnativeName | or variant,  |      |      | rString |          |
|    |             | feature name |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 8. | official    | Phrases,     | O    | 1    | C       | Unre     |
|    | Description | coordinates, |      |      | haracte | stricted |
|    |             | meets and    |      |      | rString |          |
|    |             | bounds, name |      |      |         |          |
|    |             | of the       |      |      |         |          |
|    |             | organization |      |      |         |          |
|    |             | responsible  |      |      |         |          |
|    |             | for          |      |      |         |          |
|    |             | a            |      |      |         |          |
|    |             | dministering |      |      |         |          |
|    |             | the unit, or |      |      |         |          |
|    |             | other        |      |      |         |          |
|    |             | a            |      |      |         |          |
|    |             | uthoritative |      |      |         |          |
|    |             | information  |      |      |         |          |
|    |             | describing   |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 9. | i           | Specific     | M    | 1    | C       | Unre     |
|    | nstanceCode | code that    |      |      | haracte | stricted |
|    |             | identifies   |      |      | rString |          |
|    |             | the          |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 10 | codingSyst  | Citation,    | C/if | \*   | C       | Unre     |
| .  | emReference | reference,   | code |      | haracte | stricted |
|    |             | or           | ex   |      | rString |          |
|    |             | d            | ists |      |         |          |
|    |             | ocumentation |      |      |         |          |
|    |             | identifying  |      |      |         |          |
|    |             | the instance |      |      |         |          |
|    |             | code type,   |      |      |         |          |
|    |             | for example  |      |      |         |          |
|    |             | USPS ZIP+4   |      |      |         |          |
|    |             | code         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 11 | ef          | Date on      | O    | 2    | Date    | Any      |
| .  | fectiveDate | which a      |      |      |         | valid    |
|    |             | geographic   |      |      |         | geometry |
|    |             | area change  |      |      |         | type     |
|    |             | took effect  |      |      |         | from ISO |
|    |             |              |      |      |         | 19107    |
+----+-------------+--------------+------+------+---------+----------+
| 12 | geometry    | Geometric    | O    | \*   | \<\<Ty  | Defined  |
| .  |             | re           |      |      | pe\>\>\ | in ISO   |
|    |             | presentation |      |      | GM_     | 19107    |
|    |             | of the       |      |      | Surface |          |
|    |             | feature      |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 13 | extended    | Group of     | O    | \*   | \<\     | Unre     |
| .  |             | properties   |      |      | <DataTy | stricted |
|    |             | that permit  |      |      | pe\>\>\ |          |
|    |             | the          |      |      | Framewo |          |
|    |             | id           |      |      | rk::Ext |          |
|    |             | entification |      |      | endedAt |          |
|    |             | and          |      |      | tribute |          |
|    |             | transport of |      |      |         |          |
|    |             | unofficial   |      |      |         |          |
|    |             | feature      |      |      |         |          |
|    |             | attributes   |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 14 | Role name:  | Links the    | O    | \*   | \<      |          |
| .  | bounded by  | Ge           |      |      | \<Featu |          |
|    |             | ographicArea |      |      | re\>\>\ |          |
|    |             | to the       |      |      | B       |          |
|    |             | Boundary     |      |      | oundary |          |
|    |             | curves and   |      |      |         |          |
|    |             | Boundary     |      |      |         |          |
|    |             | attributes   |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 15 | Role name:  | Links        | M    | \*   | \<      |          |
| .  | toMaintUnit | destination  |      |      | \<Featu |          |
|    |             | Geo          |      |      | re\>\>\ |          |
|    |             | graphicAreas |      |      | Geograp |          |
|    |             | to the       |      |      | hicArea |          |
|    |             | Maintenance  |      |      |         |          |
|    |             | Relationship |      |      |         |          |
|    |             | that         |      |      |         |          |
|    |             | describes    |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | relationship |      |      |         |          |
|    |             | between two  |      |      |         |          |
|    |             | or more      |      |      |         |          |
|    |             | specified    |      |      |         |          |
|    |             | Geo          |      |      |         |          |
|    |             | graphicAreas |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 16 | Role name:  | Links        | M    | \*   | \<      |          |
| .  | toSpUnit    | destination  |      |      | \<Featu |          |
|    |             | Geo          |      |      | re\>\>\ |          |
|    |             | graphicAreas |      |      | Geograp |          |
|    |             | to the       |      |      | hicArea |          |
|    |             | Spatial      |      |      |         |          |
|    |             | Relationship |      |      |         |          |
|    |             | that         |      |      |         |          |
|    |             | describes    |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | relationship |      |      |         |          |
|    |             | between two  |      |      |         |          |
|    |             | or more      |      |      |         |          |
|    |             | specified    |      |      |         |          |
|    |             | Geo          |      |      |         |          |
|    |             | graphicAreas |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 17 | Role name:  | Links source | O    | 1    | \<      |          |
| .  | fr          | Geo          |      |      | \<Featu |          |
|    | omMaintUnit | graphicAreas |      |      | re\>\>\ |          |
|    |             | to the       |      |      | Geograp |          |
|    |             | Maintenance  |      |      | hicArea |          |
|    |             | Relationship |      |      |         |          |
|    |             | that         |      |      |         |          |
|    |             | describes    |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | relationship |      |      |         |          |
|    |             | between two  |      |      |         |          |
|    |             | or more      |      |      |         |          |
|    |             | specified    |      |      |         |          |
|    |             | Geo          |      |      |         |          |
|    |             | graphicAreas |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 18 | Role name:  | Links source | O    | 1    | \<      |          |
| .  | fromSpUnit  | Geo          |      |      | \<Featu |          |
|    |             | graphicAreas |      |      | re\>\>\ |          |
|    |             | to the       |      |      | Geograp |          |
|    |             | Spatial      |      |      | hicArea |          |
|    |             | Relationship |      |      |         |          |
|    |             | that         |      |      |         |          |
|    |             | describes    |      |      |         |          |
|    |             | the          |      |      |         |          |
|    |             | relationship |      |      |         |          |
|    |             | between two  |      |      |         |          |
|    |             | or more      |      |      |         |          |
|    |             | specified    |      |      |         |          |
|    |             | Geo          |      |      |         |          |
|    |             | graphicAreas |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## GovernmentalUnit {#governmentalunit .Heading-H2-Subclause-with-title}

> GovernmentalUnit is a type of geographic area with legally defined
> boundaries established under Federal, Tribal, State, or local law, and
> with the authority to elect or appoint officials and raise revenues
> through taxes. A non-exhaustive list of known GovernmentalUnits are
> specified in the code list GovernmentalUnitType and defined in the
> optional typeDefinition.

[]{#__RefHeading___Toc193613749 .anchor}Table 3 -- Data dictionary for
GovernmentalUnit

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 19 | Gover       | Type of      |      |      | \       | Lines    |
| .  | nmentalUnit | geographic   |      |      | <\<Feat | 20-21    |
|    |             | area with    |      |      | ure\>\> |          |
|    |             | legally      |      |      |         |          |
|    |             | defined      |      |      |         |          |
|    |             | boundaries   |      |      |         |          |
|    |             | established  |      |      |         |          |
|    |             | under        |      |      |         |          |
|    |             | Federal,     |      |      |         |          |
|    |             | Tribal,      |      |      |         |          |
|    |             | State, or    |      |      |         |          |
|    |             | local law,   |      |      |         |          |
|    |             | and with the |      |      |         |          |
|    |             | authority to |      |      |         |          |
|    |             | elect or     |      |      |         |          |
|    |             | appoint      |      |      |         |          |
|    |             | officials    |      |      |         |          |
|    |             | and raise    |      |      |         |          |
|    |             | revenues     |      |      |         |          |
|    |             | through      |      |      |         |          |
|    |             | taxes        |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 20 | governmen   | Name of the  | M    | 1    | \<\     | Unre     |
| .  | talUnitType | type of      |      |      | <CodeLi | stricted |
|    |             | geographic   |      |      | st\>\>\ |          |
|    |             | area with    |      |      | Govern  |          |
|    |             | geographic   |      |      | mentalU |          |
|    |             | entity with  |      |      | nitType |          |
|    |             | legally      |      |      |         |          |
|    |             | defined      |      |      |         |          |
|    |             | boundaries   |      |      |         |          |
|    |             | established  |      |      |         |          |
|    |             | under        |      |      |         |          |
|    |             | Federal,     |      |      |         |          |
|    |             | State,       |      |      |         |          |
|    |             | Tribal, or   |      |      |         |          |
|    |             | local law,   |      |      |         |          |
|    |             | and with the |      |      |         |          |
|    |             | authority to |      |      |         |          |
|    |             | elect or     |      |      |         |          |
|    |             | appoint      |      |      |         |          |
|    |             | officials    |      |      |         |          |
|    |             | and raise    |      |      |         |          |
|    |             | revenues     |      |      |         |          |
|    |             | through      |      |      |         |          |
|    |             | taxes        |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 21 | typ         | Definition   | C/if | 1    | C       | Unre     |
| .  | eDefinition | of the unit  | G    |      | haracte | stricted |
|    |             | type         | over |      | rString |          |
|    |             |              | nmen |      |         |          |
|    |             |              | tal\ |      |         |          |
|    |             |              | Unit |      |         |          |
|    |             |              | Type |      |         |          |
|    |             |              | Code |      |         |          |
|    |             |              | is   |      |         |          |
|    |             |              | not  |      |         |          |
|    |             |              | en   |      |         |          |
|    |             |              | umer |      |         |          |
|    |             |              | ated |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## AdministrativeUnit {#administrativeunit .Heading-H2-Subclause-with-title}

> AdministrativeUnit is a type of geographic area established by rule or
> regulation of a legislative, executive, or judicial governmental
> authority, a non-profit organization, or private industry for the
> execution of some function. A non-exhaustive list of known
> AdministrativeUnits are specified in the code list
> AdministrativeUnitTypeCode and defined in the optional typeDefinition.

[]{#__RefHeading___Toc193613750 .anchor}Table 4 -- Data dictionary for
AdministrativeUnit

+----+-------------+--------------+-------+------+---------+----------+
| Li | Name/Role   | Definition   | Ob    | Max  | Data    | Domain   |
| ne | Name        |              | ligat | imum | Type    |          |
|    |             |              | ion/\ | Oc   |         |          |
|    |             |              | Cond  | curr |         |          |
|    |             |              | ition | ence |         |          |
+====+=============+==============+=======+======+=========+==========+
| 22 | Adminis     | Type of      |       |      | \       | Lines    |
| .  | trativeUnit | geographic   |       |      | <\<Feat | 23-24    |
|    |             | area         |       |      | ure\>\> |          |
|    |             | established  |       |      |         |          |
|    |             | by rule or   |       |      |         |          |
|    |             | regulation   |       |      |         |          |
|    |             | of a         |       |      |         |          |
|    |             | legislative, |       |      |         |          |
|    |             | executive,   |       |      |         |          |
|    |             | or judicial  |       |      |         |          |
|    |             | governmental |       |      |         |          |
|    |             | authority, a |       |      |         |          |
|    |             | non-profit   |       |      |         |          |
|    |             | o            |       |      |         |          |
|    |             | rganization, |       |      |         |          |
|    |             | or private   |       |      |         |          |
|    |             | industry for |       |      |         |          |
|    |             | the          |       |      |         |          |
|    |             | execution of |       |      |         |          |
|    |             | some         |       |      |         |          |
|    |             | function     |       |      |         |          |
+----+-------------+--------------+-------+------+---------+----------+
| 23 | administrat | Name of the  | M     | 1    | \<\     | Unre     |
| .  | iveUnitType | type of      |       |      | <CodeLi | stricted |
|    |             | ad           |       |      | st\>\>\ |          |
|    |             | ministrative |       |      | A       |          |
|    |             | unit         |       |      | dminist |          |
|    |             | established  |       |      | rativeU |          |
|    |             | by rule or   |       |      | nitType |          |
|    |             | regulation   |       |      |         |          |
|    |             | of a         |       |      |         |          |
|    |             | legislative, |       |      |         |          |
|    |             | executive,   |       |      |         |          |
|    |             | or judicial  |       |      |         |          |
|    |             | governmental |       |      |         |          |
|    |             | authority, a |       |      |         |          |
|    |             | non-profit   |       |      |         |          |
|    |             | o            |       |      |         |          |
|    |             | rganization, |       |      |         |          |
|    |             | a            |       |      |         |          |
|    |             | corporation, |       |      |         |          |
|    |             | or a private |       |      |         |          |
|    |             | party for    |       |      |         |          |
|    |             | the          |       |      |         |          |
|    |             | execution of |       |      |         |          |
|    |             | some         |       |      |         |          |
|    |             | function     |       |      |         |          |
+----+-------------+--------------+-------+------+---------+----------+
| 24 | typ         | Definition   | C/if  | 1    | C       | Unre     |
| .  | eDefinition | of the unit  | Admin |      | haracte | stricted |
|    |             | type         | istra |      | rString |          |
|    |             |              | tive\ |      |         |          |
|    |             |              | Un    |      |         |          |
|    |             |              | itTyp |      |         |          |
|    |             |              | eCode |      |         |          |
|    |             |              | is    |      |         |          |
|    |             |              | not   |      |         |          |
|    |             |              | enume |      |         |          |
|    |             |              | rated |      |         |          |
+----+-------------+--------------+-------+------+---------+----------+

## StatisticalUnit {#statisticalunit .Heading-H2-Subclause-with-title}

> StatisticalUnit is a type of geographic area defined for the
> collection, tabulation, and/or publication of demographic, and/or
> other statistical data. A non-exhaustive list of known
> StatisticalUnits are specified in the code list StatisticalUnitType
> and defined in the optional typeDefinition.

[]{#__RefHeading___Toc193613751 .anchor}Table 5 -- Data dictionary for
StatisticalUnit

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | O    |         |          |
|    |             |              | C    | ccur |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 25 | Stat        | Sta          |      |      | \       | Lines    |
| .  | isticalUnit | tisticalUnit |      |      | <\<Feat | 26-27    |
|    |             | is a type of |      |      | ure\>\> |          |
|    |             | geographic   |      |      |         |          |
|    |             | area defined |      |      |         |          |
|    |             | for the      |      |      |         |          |
|    |             | collection,  |      |      |         |          |
|    |             | tabulation,  |      |      |         |          |
|    |             | and/or       |      |      |         |          |
|    |             | publication  |      |      |         |          |
|    |             | of           |      |      |         |          |
|    |             | demographic, |      |      |         |          |
|    |             | and/or other |      |      |         |          |
|    |             | statistical  |      |      |         |          |
|    |             | data         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 26 | statisti    | Name of the  | M    | 1    | \<\     | Unre     |
| .  | calUnitType | type of      |      |      | <CodeLi | stricted |
|    |             | statistical  |      |      | st\>\>\ |          |
|    |             | unit defined |      |      | Stati   |          |
|    |             | for the      |      |      | sticalU |          |
|    |             | collection,  |      |      | nitType |          |
|    |             | tabulation,  |      |      |         |          |
|    |             | analysis,    |      |      |         |          |
|    |             | and/or       |      |      |         |          |
|    |             | publication  |      |      |         |          |
|    |             | of           |      |      |         |          |
|    |             | demographic, |      |      |         |          |
|    |             | economic, or |      |      |         |          |
|    |             | other        |      |      |         |          |
|    |             | statistical  |      |      |         |          |
|    |             | data         |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 27 | typ         | Definition   | C/if | 1    | C       | Unre     |
| .  | eDefinition | of the unit  | Stat |      | haracte | stricted |
|    |             | type         | isti |      | rString |          |
|    |             |              | calU |      |         |          |
|    |             |              | nit\ |      |         |          |
|    |             |              | Type |      |         |          |
|    |             |              | Code |      |         |          |
|    |             |              | is   |      |         |          |
|    |             |              | not  |      |         |          |
|    |             |              | en   |      |         |          |
|    |             |              | umer |      |         |          |
|    |             |              | ated |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## OtherUnit {#otherunit .Heading-H2-Subclause-with-title}

> OtherUnit are types of geographic areas that are not governmental
> units, administrative units, or statistical units as defined herein,
> and are areas not defined or described in other framework parts.

[]{#__RefHeading___Toc193613752 .anchor}Table 6 -- Data dictionary for
OtherUnit

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 28 | OtherUnit   | Type of      |      |      | \       | Lines    |
| .  |             | geographic   |      |      | <\<Feat | 29-30    |
|    |             | area that is |      |      | ure\>\> |          |
|    |             | not a        |      |      |         |          |
|    |             | governmental |      |      |         |          |
|    |             | unit,        |      |      |         |          |
|    |             | ad           |      |      |         |          |
|    |             | ministrative |      |      |         |          |
|    |             | unit, or     |      |      |         |          |
|    |             | statistical  |      |      |         |          |
|    |             | unit as      |      |      |         |          |
|    |             | defined      |      |      |         |          |
|    |             | herein, and  |      |      |         |          |
|    |             | is not an    |      |      |         |          |
|    |             | area defined |      |      |         |          |
|    |             | or described |      |      |         |          |
|    |             | in other     |      |      |         |          |
|    |             | framework    |      |      |         |          |
|    |             | parts        |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 29 | ot          | Name of the  | M    | 1    | C       | Unre     |
| .  | herUnitType | type of      |      |      | haracte | stricted |
|    |             | other        |      |      | rString |          |
|    |             | geographic   |      |      |         |          |
|    |             | area that is |      |      |         |          |
|    |             | not a        |      |      |         |          |
|    |             | governmental |      |      |         |          |
|    |             | unit,        |      |      |         |          |
|    |             | ad           |      |      |         |          |
|    |             | ministrative |      |      |         |          |
|    |             | unit, or     |      |      |         |          |
|    |             | statistical  |      |      |         |          |
|    |             | unit, and is |      |      |         |          |
|    |             | not an area  |      |      |         |          |
|    |             | defined or   |      |      |         |          |
|    |             | described in |      |      |         |          |
|    |             | other        |      |      |         |          |
|    |             | framework    |      |      |         |          |
|    |             | parts        |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 30 | typ         | Definition   | M    | 1    | C       | Unre     |
| .  | eDefinition | of the unit  |      |      | haracte | stricted |
|    |             | type         |      |      | rString |          |
+----+-------------+--------------+------+------+---------+----------+

## Boundary {#boundary .Heading-H2-Subclause-with-title}

> Boundary is a feature type that captures the information about the
> individual boundary segments being described, including the
> descriptive attribute information, and geometry about the one or more
> specific instances being described. Boundary can optionally bound one
> or more GeographicAreas or may be used to exchange boundary segments.
> Boundaries may have "changeControlledBy" roles in associations with
> one or more MaintenanceRelationships.

[]{#__RefHeading___Toc193613753 .anchor}Table 7 -- Data dictionary for
Boundary

+----+-------------+--------------+------+------+--------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data   | Domain   |
| ne | Name        |              | gati | imum | Type   |          |
|    |             |              | on/\ | Oc   |        |          |
|    |             |              | C    | curr |        |          |
|    |             |              | ondi | ence |        |          |
|    |             |              | tion |      |        |          |
+====+=============+==============+======+======+========+==========+
| 31 | Boundary    | Set that     | O    | \*   | \<\    | Lines    |
| .  |             | represents   |      |      | <Featu | 32-39    |
|    |             | the limit of |      |      | re\>\> |          |
|    |             | an entity    |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 32 | boundaryId  | Identifier   | M    | 1    | \<\<D  | Unre     |
| .  |             | assigned to  |      |      | ataTyp | stricted |
|    |             | the boundary |      |      | e\>\>\ |          |
|    |             |              |      |      | Fra    |          |
|    |             |              |      |      | mework |          |
|    |             |              |      |      | ::Iden |          |
|    |             |              |      |      | tifier |          |
+----+-------------+--------------+------+------+--------+----------+
| 33 | official    | Phrases,     | O    | 1    | Cha    | Unre     |
| .  | Description | coordinates, |      |      | racter | stricted |
|    |             | meets and    |      |      | String |          |
|    |             | bounds, name |      |      |        |          |
|    |             | of the       |      |      |        |          |
|    |             | organization |      |      |        |          |
|    |             | responsible  |      |      |        |          |
|    |             | for          |      |      |        |          |
|    |             | a            |      |      |        |          |
|    |             | dministering |      |      |        |          |
|    |             | the unit, or |      |      |        |          |
|    |             | other        |      |      |        |          |
|    |             | a            |      |      |        |          |
|    |             | uthoritative |      |      |        |          |
|    |             | information  |      |      |        |          |
|    |             | describing   |      |      |        |          |
|    |             | the          |      |      |        |          |
|    |             | geographic   |      |      |        |          |
|    |             | area         |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 34 | boundar     | Term or      | O    | \*   | \<\<D  | Unre     |
| .  | yClassifier | phrase       |      |      | ataTyp | stricted |
|    |             | describing   |      |      | e\>\>\ |          |
|    |             | the boundary |      |      | Bounda |          |
|    |             | or boundary  |      |      | ryClas |          |
|    |             | attributes   |      |      | sifier |          |
|    |             | and,         |      |      |        |          |
|    |             | optionally,  |      |      |        |          |
|    |             | the          |      |      |        |          |
|    |             | citation,    |      |      |        |          |
|    |             | reference,   |      |      |        |          |
|    |             | or           |      |      |        |          |
|    |             | d            |      |      |        |          |
|    |             | ocumentation |      |      |        |          |
|    |             | defining or  |      |      |        |          |
|    |             | further      |      |      |        |          |
|    |             | describing   |      |      |        |          |
|    |             | the term or  |      |      |        |          |
|    |             | phrase       |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 35 | ef          | Date on      | O    | 2    | Da     | Defined  |
| .  | fectiveDate | which a      |      |      | teTime | in ISO   |
|    |             | geographic   |      |      |        | 19103    |
|    |             | area change  |      |      |        |          |
|    |             | took effect  |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 36 | curve       | 1            | M    | \*   | \      | Defined  |
| .  |             | -dimensional |      |      | <\<Typ | in ISO   |
|    |             | geometric    |      |      | e\>\>\ | 19107    |
|    |             | primitive,   |      |      | GM     |          |
|    |             | representing |      |      | _Curve |          |
|    |             | the          |      |      |        |          |
|    |             | continuous   |      |      |        |          |
|    |             | image of a   |      |      |        |          |
|    |             | line         |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 37 | extended    | Group of     | O    | 1    | \<\<D  | Unre     |
| .  |             | properties   |      |      | ataTyp | stricted |
|    |             | that permit  |      |      | e\>\>\ |          |
|    |             | the          |      |      | Fram   |          |
|    |             | id           |      |      | ework: |          |
|    |             | entification |      |      | :Exten |          |
|    |             | and          |      |      | dedAtt |          |
|    |             | transport of |      |      | ribute |          |
|    |             | unofficial   |      |      |        |          |
|    |             | feature      |      |      |        |          |
|    |             | attributes   |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 38 | Role name:  | Links        | O    | \*   | \<\<   |          |
| .  | changeC     | Boundaries   |      |      | Featur |          |
|    | ontrolledBy | to the       |      |      | e\>\>\ |          |
|    |             | Maintenance  |      |      | Ma     |          |
|    |             | Relationship |      |      | intena |          |
|    |             | that         |      |      | nceRel |          |
|    |             | describes    |      |      | ation\ |          |
|    |             | the          |      |      | ship   |          |
|    |             | relationship |      |      |        |          |
|    |             | between two  |      |      |        |          |
|    |             | or more      |      |      |        |          |
|    |             | specified    |      |      |        |          |
|    |             | Boundaries   |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+
| 39 | Role name:  | Links        | 0    | \*   | \<\<   |          |
| .  | bounds      | Boundaries   |      |      | Featur |          |
|    |             | to the       |      |      | e\>\>\ |          |
|    |             | Ge           |      |      | Geog   |          |
|    |             | ographicArea |      |      | raphic |          |
|    |             | contained    |      |      | Area   |          |
|    |             | within the   |      |      |        |          |
|    |             | limiting     |      |      |        |          |
|    |             | Boundaries   |      |      |        |          |
+----+-------------+--------------+------+------+--------+----------+

## MaintenanceRelationship {#maintenancerelationship .Heading-H2-Subclause-with-title}

> A maintenance relationship exists when there is a relative dependency
> between two or more geographic areas for maintaining common boundary
> or area information. A fromUnitId, or source, one to many toUnitIds,
> or targets, a changeDeterminationType, and a changeType shall be
> provided for each maintenance relationship.

[]{#__RefHeading___Toc193613754 .anchor}Table 8 -- Data dictionary for
MaintenanceRelationship

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 40 | M           | Relative     |      |      | \       | Lines    |
| .  | aintenanceR | dependency   |      |      | <\<Feat | 41-44    |
|    | elationship | between two  |      |      | ure\>\> |          |
|    |             | or more      |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | areas for    |      |      |         |          |
|    |             | maintaining  |      |      |         |          |
|    |             | common       |      |      |         |          |
|    |             | boundary or  |      |      |         |          |
|    |             | area         |      |      |         |          |
|    |             | information  |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 41 | maintRelId  | Name or code | M    | 1    | \<\     | Unre     |
| .  |             | identifying  |      |      | <DataTy | stricted |
|    |             | the specific |      |      | pe\>\>\ |          |
|    |             | maintenance  |      |      | Framewo |          |
|    |             | relationship |      |      | rk::Ide |          |
|    |             | instance     |      |      | ntifier |          |
+----+-------------+--------------+------+------+---------+----------+
| 42 | c           | Specifies    | M    | 1    | \<\     | Unre     |
| .  | hangeDeterm | the          |      |      | <CodeLi | stricted |
|    | inationType | inter        |      |      | st\>\>\ |          |
|    |             | dependencies |      |      | Det     |          |
|    |             | for the      |      |      | erminat |          |
|    |             | identified   |      |      | ionType |          |
|    |             | Boundary     |      |      |         |          |
|    |             | segments     |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 43 | changeType  | Type of      | M    | 1    | \<\     | Unre     |
| .  |             | boundary     |      |      | <CodeLi | stricted |
|    |             | change in    |      |      | st\>\>\ |          |
|    |             | the          |      |      | Spa     |          |
|    |             | maintenance  |      |      | tialCha |          |
|    |             | relationship |      |      | ngeType |          |
+----+-------------+--------------+------+------+---------+----------+
| 44 | share       | Boundary     | O    | \*   | \<\     | Unre     |
| .  | dBoundaryId | instanceCode |      |      | <DataTy | stricted |
|    |             | identifying  |      |      | pe\>\>\ |          |
|    |             | the boundary |      |      | Framewo |          |
|    |             | curve(s)     |      |      | rk::Ide |          |
|    |             | involved in  |      |      | ntifier |          |
|    |             | the          |      |      |         |          |
|    |             | maintenance  |      |      |         |          |
|    |             | relationship |      |      |         |          |
|    |             | inter        |      |      |         |          |
|    |             | dependencies |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## SpatialRelationship {#spatialrelationship .Heading-H2-Subclause-with-title}

> SpatialRelationships describe the relative spatial location of two
> geographic area features and their boundaries.
>
> A fromUnitId, or source, one to many toUnitAreaIds, or targets, and a
> fromToSpatialRelationship shall be provided for each
> spatialRelationship.

[]{#__RefHeading___Toc193613755 .anchor}Table 9 -- Data dictionary for
SpatialRelationship

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 45 | SpatialR    | Relative     |      |      | \       | Line 46  |
| .  | elationship | spatial      |      |      | <\<Feat |          |
|    |             | location of  |      |      | ure\>\> |          |
|    |             | two          |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area         |      |      |         |          |
|    |             | features and |      |      |         |          |
|    |             | their        |      |      |         |          |
|    |             | boundaries   |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 46 | fro         | Specifies    | M    | 1    | \<\     | Unre     |
| .  | mToSpatialR | the type of  |      |      | <CodeLi | stricted |
|    | elationship | spatial      |      |      | st\>\>\ |          |
|    |             | relationship |      |      | Spatia  |          |
|    |             | between the  |      |      | lRelati |          |
|    |             | identified   |      |      | onship\ |          |
|    |             | geographic   |      |      | List    |          |
|    |             | areas        |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+

## BoundaryClassifier {#boundaryclassifier .Heading-H2-Subclause-with-title}

> BoundaryClassifier is a class that links a free text
> boundaryClassifier and optionally a reference for the
> boundaryClassifier with one or many specific boundaries.

[]{#__RefHeading___Toc193613756 .anchor}Table 10 -- Data dictionary for
BoundaryClassifier

+----+-------------+--------------+------+------+---------+----------+
| Li | Name/Role   | Definition   | Obli | Max  | Data    | Domain   |
| ne | Name        |              | gati | imum | Type    |          |
|    |             |              | on/\ | Oc   |         |          |
|    |             |              | C    | curr |         |          |
|    |             |              | ondi | ence |         |          |
|    |             |              | tion |      |         |          |
+====+=============+==============+======+======+=========+==========+
| 47 | Boundar     | Relative     |      |      | \<      | Line     |
| .  | yClassifier | spatial      |      |      | \<DataT | 48-49    |
|    |             | location of  |      |      | ype\>\> |          |
|    |             | two          |      |      |         |          |
|    |             | geographic   |      |      |         |          |
|    |             | area         |      |      |         |          |
|    |             | features and |      |      |         |          |
|    |             | their        |      |      |         |          |
|    |             | boundaries   |      |      |         |          |
+----+-------------+--------------+------+------+---------+----------+
| 48 | boundar     |              | M    | 1    | C       | Unre     |
| .  | yClassifier |              |      |      | haracte | stricted |
|    |             |              |      |      | rString |          |
+----+-------------+--------------+------+------+---------+----------+
| 49 | bound       |              | O    | 1    | C       | Unre     |
| .  | aryClassifi |              |      |      | haracte | stricted |
|    | erReference |              |      |      | rString |          |
+----+-------------+--------------+------+------+---------+----------+

## Code lists and enumerations {#code-lists-and-enumerations .Heading-H2-Subclause-with-title}

> ![](media/image2.png){width="6.49375in" height="4.89375in"}

[]{#__RefHeading___Toc149465869 .anchor}Figure 2 -- Code lists and
enumerations

### Code lists {#code-lists .Heading-H3-Subclause-with-title}

#### AdministrativeUnitType code list {#administrativeunittype-code-list .Heading-H4-Subclause-with-title}

> AdministrativeUnitType is a CodeList of values for the attribute
> administrativeUnitType.

[]{#__RefHeading___Toc193613757 .anchor}Table 11 -- CodeList for
AdministrativeUnitType

  ------------------------------------------------------------------------------------
  Name                                    Definition
  --------------------------------------- --------------------------------------------
  americanIndianOffReservationTrustLand   The United States holds title for specific
                                          area in trust for the benefit of an American
                                          Indian tribe (Tribal trust land) or for an
                                          individual American Indian (individual trust
                                          land)

  americanIndianTribalSubdivision         A legal subdivision of a federally
                                          recognized American Indian reservation,
                                          off-reservation trust land, or Oklahoma
                                          Tribal statistical area. These entities are
                                          internal units of self-government or
                                          administration that serve social, cultural,
                                          and/or economic purposes for American
                                          Indians living on a reservation,
                                          off-reservation trust land, or Oklahoma
                                          Tribal statistical area. Tribal subdivisions
                                          are known as areas, chapters, communities,
                                          districts, and segments

  americanIndianTrustLand                 An area for which the United States holds
                                          title in trust for the benefit of an
                                          American Indian tribe (Tribal trust land) or
                                          for an individual American Indian
                                          (individual trust land)

  barrioBarrioPueblo                      The primary legal divisions of municipios in
                                          Puerto Rico

  congressionalDistrict (CD)              One of the 435 areas from which people are
                                          elected to the U.S. House of Representatives

  emergencyServiceZone                    A geographic entity, generally subdividing a
                                          county or municipality, defined for the
                                          purposes of planning and directing responses
                                          for emergency service responders, such as
                                          police, fire, and emergency medical services

  enterpriseZoneEmpowermentCommunity      A geographic entity identified for purposes
                                          of administering economic development and
                                          community redevelopment programs, generally
                                          administered by the U.S. Department of
                                          Housing and Urban Development or the U.S.
                                          Department of Agriculture

  forest                                  Bounded area of woods, forest, or grassland
                                          under the administration of a political
                                          agency (national forest, national
                                          grasslands, or State forest)

  frontierArea                            A geographic entity defined by the
                                          Department of Health and Human Services
                                          Office of Rural Health Policy for purposes
                                          of identifying counties with extremely low
                                          densities (generally less than seven people
                                          per square mile) in order to administer
                                          health programs

  groundwaterManagementZone               A three-dimensional geographic entity
                                          containing groundwater being managed to
                                          mitigate impairment caused by the release of
                                          contaminants from a site

  hawaiianHomeland (HHL)                  An area held in trust for the benefit of
                                          native Hawaiians by the State of Hawaii,
                                          pursuant to the Hawaiian Homes Commission
                                          Act of 1920, as amended

  jointUseArea                            Territory that is administered, claimed,
                                          and/or used by two or more American Indian
                                          tribes. It may consist of an overlap of
                                          territory of adjoining American Indian
                                          reservations or Oklahoma Tribal statistical
                                          areas, or off-reservation trust land for one
                                          tribe that is located within the reservation
                                          of another tribe

  minorCivilDivision (MCD)                A type of governmental unit that is the
                                          primary governmental or administrative
                                          division of a county or statistically
                                          equivalent entity in many States and
                                          statistically equivalent entities. MCDs are
                                          identified by a variety of terms, such as
                                          township, town (in eight States), or
                                          district. The U.S. Census Bureau recognizes
                                          MCDs in 28 States, the District of Columbia,
                                          Puerto Rico, and the Island Areas. In 20
                                          States and American Samoa, all or many MCDs
                                          are active general-purpose governmental
                                          units. Many MCDs are not general-purpose
                                          governmental units, and therefore do not
                                          have elected officials to carry out legal
                                          functions; instead, they serve as
                                          nonfunctioning administrative entities

  ozoneAttainmentNonattainmentArea        A geographic entity designated by the U.S.
                                          Environmental Protection Agency (EPA) for
                                          purposes of measuring, monitoring, and
                                          administering programs to improve air
                                          quality. An area is designated
                                          "nonattainment" if it has violated, or has
                                          contributed to violations of the national
                                          8-hour ozone standard over a three-year
                                          period. EPA also may designate an area as
                                          attainment/unclassifiable, if it has: 1)
                                          monitored air quality data show that area is
                                          has not violated the ozone standard over a
                                          three-year period; or if 2) there is not
                                          enough information to determine the air
                                          quality in the area

  park                                    Place or area set aside for recreation or
                                          preservation of a cultural or natural
                                          resource and under some form of government
                                          administration, not including National or
                                          State Forests or Reserves (national
                                          historical landmark, national park, State
                                          park, or Wilderness area)

  precinct                                A geographic entity subdividing a county,
                                          established by counties or municipalities
                                          for administrative or electoral purposes;
                                          one of several types of small geographic
                                          entities created by State and local
                                          governments for the purpose of administering
                                          elections

  priorityFundingArea                     An area defined for purposes of monitoring,
                                          planning, and administering efficient
                                          residential and commercial development as
                                          part of Smart Growth regulations in Maryland

  publicLandSurveySystem                  A survey of public lands; specifically the
                                          U.S. Public Land Survey system by which much
                                          of the United States was surveyed and
                                          divided into a rectangular grid system using
                                          townships, sections, and fractions of
                                          sections

  radonZone                               A geographic entity defined by the
                                          Environmental Protection Agency in response
                                          to a directive contained within Sections 307
                                          and 309 of the Indoor Radon Abatement Act of
                                          1988 (IRAA) to identify areas of the U.S.
                                          with the potential for elevated indoor radon
                                          levels. EPA's Map of Radon Zones assigns
                                          each of the 3,141 counties in the U.S. to
                                          one of three zones based on radon potential

  schoolAttendanceArea                    A special-purpose geographic entity
                                          delineated by State, county, or local
                                          officials designating the school(s) that
                                          school-age children in that particular area
                                          must attend

  stateLegislativeDistrict                The area represented by a member of the
                                          upper or lower chamber of a State
                                          legislature (or, for Nebraska, the
                                          unicameral legislature)

  subbarrio                               A legal subdivision of a barrio or
                                          barrio-pueblo (minor civil division) in 23
                                          municipios in Puerto Rico

  surveyTownship                          The unit of survey of the U.S. Public Land
                                          Survey system representing a piece of land
                                          that is bounded on the east and west by
                                          meridians approximately six miles apart
                                          (exactly six miles at its south border) and
                                          on the north and south by parallels six
                                          miles apart, that is normally subdivided
                                          into 35 sections

  township                                A administrative unit that is a minor civil
                                          division in Arkansas, New Hampshire,
                                          Missouri, and North Carolina (Some townships
                                          in Missouri are functioning governmental
                                          units)

  urbanGrowthAreaUrbanGrowthBoundary      An area defined for purposes of monitoring
                                          and controlling urban and suburban
                                          residential and commercial development. For
                                          instance, in Oregon, an "urban growth
                                          boundary" is delineated around each
                                          incorporated place or a group of
                                          incorporated places by State and local
                                          officials, and subsequently confirmed in
                                          State law, to control urban development

  votingDistrict (VTD)                    The generic name for a geographic
                                          entity---such as an election district,
                                          precinct, or ward---established by Tribal,
                                          State, and local governments for the purpose
                                          of conducting elections

  ward                                    A type of local electoral subdivision of an
                                          incorporated place or minor civil division
  ------------------------------------------------------------------------------------

#### DeterminationType code list {#determinationtype-code-list .Heading-H4-Subclause-with-title}

> DeterminiationType is a CodeList of values for the attribute
> changeDeterminationType.

[]{#__RefHeading___Toc193613758 .anchor}Table 12 -- CodeList for
DeterminationType

  -----------------------------------------------------------------------
  Name                       Definition
  -------------------------- --------------------------------------------
  coDetermined               Changes to a boundary segment by either
                             geographic area that shares the boundary
                             segment imposes the same changes to the
                             boundary of another geographic area that
                             shares the same boundary segment

  determinedBy               Changes to a boundary segment by another
                             geographic area require the same changes to
                             the boundary of a particular geographic area
                             that shares the same boundary segment. This
                             is the opposite of and potential reciprocal
                             condition to \"determines\"

  determines                 Changes to a boundary segment by one
                             geographic area require the same changes to
                             the boundary of another geographic area that
                             shares the boundary segment

  independentOf              Changes to a boundary segment by one
                             geographic area creates a new, unshared
                             boundary segment in the boundary of that
                             geographic area, and impose no changes to
                             the boundary of another geographic area that
                             shared the boundary segment by coincidence
  -----------------------------------------------------------------------

#### GovernmentalUnitType code list {#governmentalunittype-code-list .Heading-H4-Subclause-with-title}

> GovernmentalUnitType is a CodeList of values for the attribute
> governmentalUnitType.

[]{#__RefHeading___Toc193613759 .anchor}Table 13 -- CodeList for
GovernmentalUnitType

  -----------------------------------------------------------------------------------------------
  Name                                               Definition
  -------------------------------------------------- --------------------------------------------
  alaskaNativeRegionalCorporation (ANRC)             A corporate entity established to conduct
                                                     both business and nonprofit affairs of
                                                     Alaska Natives, pursuant to the Alaska
                                                     Native Claims Settlement Act of 1972 (Public
                                                     Law 92-203, as amended by Public Law
                                                     94-204). Twelve ANRCs are legally bounded
                                                     geographic entities that cover Alaska,
                                                     except for the Annette Islands Reserve (an
                                                     American Indian reservation). A thirteenth
                                                     ANRC represents Alaska Natives who do not
                                                     live in Alaska and do not identify with any
                                                     of the 12 corporations

  alaskaNativeVillage (ANV)                          A local governmental unit in Alaska that
                                                     constitutes an association, band, clan,
                                                     community, group, tribe, or village,
                                                     recognized pursuant to the Alaska Native
                                                     Claims Settlement Act of 1972 (Public Law
                                                     92-203, as amended Public Law 94-204). ANVs
                                                     do not have clearly defined boundaries that
                                                     are easily locatable, and they often include
                                                     many square miles of land used by Alaska
                                                     Natives for hunting and fishing, so the U.S.
                                                     Census Bureau works with officials of the
                                                     Alaska Native villages and Alaska Native
                                                     Regional Corporations to delineate Alaska
                                                     Native village statistical areas for data
                                                     presentation purposes

  americanIndianReservation                          A Federal American Indian reservation is an
                                                     area that has been set aside by the United
                                                     States for the use of one or more federally
                                                     recognized American Indian tribes. Together
                                                     with off-reservation trust land, a
                                                     reservation covers territory over which one
                                                     or more tribes have primary governmental
                                                     authority. The boundary of a Federal
                                                     reservation is defined by Tribal treaty,
                                                     agreement, executive or secretarial order,
                                                     Federal statute, or judicial determination.
                                                     A State American Indian reservation is an
                                                     area that a State government has allocated
                                                     to a tribe recognized by that State, but not
                                                     by the Federal government. American Indian
                                                     reservations are known as colonies,
                                                     communities, Indian communities, Indian
                                                     villages, pueblos, rancherias, ranches,
                                                     reservations, reserves, and villages

  americanIndianTribalSubdivision                    A legal subdivision of a federally
                                                     recognized American Indian reservation,
                                                     off-reservation trust land, or Oklahoma
                                                     Tribal statistical area. These entities are
                                                     internal units of self-government or
                                                     administration that serve social, cultural,
                                                     and/or economic purposes for American
                                                     Indians. Tribal subdivisions are known as
                                                     areas, chapters, communities, districts, and
                                                     segments

  borough                                            A legally established geographic entity in
                                                     Alaska, which the Census Bureau treats as
                                                     statistically equivalent to a county in
                                                     other States; a minor civil division in each
                                                     of the five counties that comprise New York
                                                     city; a type of incorporated place in
                                                     Connecticut, New Jersey, and Pennsylvania

  city                                               A type of incorporated place in all States
                                                     and the District of Columbia. In agreement
                                                     with Hawaii, the U.S. Census Bureau does not
                                                     recognize the city of Honolulu for
                                                     presentation of census data. In Virginia,
                                                     all cities are not part of any county, and
                                                     so the Census Bureau treats them as
                                                     equivalent to a county for data presentation
                                                     purposes, as well as treating them as
                                                     incorporated places; there also is one such
                                                     independent city in each of three States:
                                                     Maryland, Missouri, and Nevada. In 23 States
                                                     and the District of Columbia, some or all
                                                     cities are not part of any minor civil
                                                     division, in which case the U.S. Census
                                                     Bureau treats them as county divisions as
                                                     well as incorporated places for data
                                                     presentation purposes

  cityAndBorough                                     A legally established geographic entity in
                                                     Alaska, which the U.S. Census Bureau treats
                                                     as the statistical equivalent of a county in
                                                     other States; also, a type of incorporated
                                                     place in Alaska

  consolidatedCity                                   The U.S. Census Bureau refers to a
                                                     governmental unit for which the functions of
                                                     an incorporated place and its county or
                                                     minor civil division have merged as a
                                                     consolidated government. If one or more
                                                     other incorporated places continue to
                                                     function as separate governmental units even
                                                     though they are part of a consolidated
                                                     government, the U.S. Census Bureau refers to
                                                     the primary incorporated place as a
                                                     consolidated city

  country                                            An independent, self-governing, political
                                                     entity

  county                                             The primary legal division of every State
                                                     except Alaska and Louisiana

  elementarySchoolDistrict                           A school district inclusive of kindergarten
                                                     through either the eighth or ninth grade or
                                                     the first through either the eighth or ninth
                                                     grade

  minorCivilDivision (MCD)                           A type of governmental unit that is the
                                                     primary governmental or administrative
                                                     division of a county or statistically
                                                     equivalent entity in many States. MCDs are
                                                     identified by a variety of terms, such as
                                                     township, town (in eight States), or
                                                     district. The U.S. Census Bureau recognizes
                                                     MCDs in 28 States, the District of Columbia,
                                                     Puerto Rico, and the Island Areas. In 20
                                                     States and American Samoa, all or many MCDs
                                                     are active general-purpose governmental
                                                     units. Many MCDs are not general-purpose
                                                     governmental units, and therefore do not
                                                     have elected officials to carry out legal
                                                     functions; instead, they serve as
                                                     nonfunctioning administrative entities

  mosquitoControlDistrictMosquitoAbatementDistrict   A geographic area defined for purposes of
                                                     administering mosquito abatement or mosquito
                                                     surveillance programs

  municipio                                          A governmental unit that is the primary
                                                     legal division of Puerto Rico

  municipality                                       A governmental unit that is a primary legal
                                                     division in Alaska and the Northern Mariana
                                                     Islands

  parish                                             A governmental unit that is the primary
                                                     legal division of Louisiana

  schoolDistrict                                     A geographic entity within which State,
                                                     county, or local officials or the U.S.
                                                     Department of Defense provides public
                                                     educational services for an area's residents

  secondarySchoolDistrict                            A school district inclusive of only high
                                                     school (either the ninth through the twelfth
                                                     grades or the tenth through the twelfth
                                                     grades)

  specialTaxationDistrict                            An area defined for purposes of raising
                                                     revenue to fund specific projects or
                                                     programs, or to meet specific ongoing needs,
                                                     such as security, trash collection, or
                                                     infrastructure maintenance. Also known as
                                                     business improvement districts (BID),
                                                     downtown improvement districts (DID),
                                                     special improvement districts (SID), or
                                                     assessment districts

  state                                              A primary governmental division of the
                                                     United States

  town                                               A governmental unit that is a functioning
                                                     minor civil division found in the New
                                                     England States, New York, and Wisconsin; and
                                                     a type of incorporated place in 30 States
                                                     and the U.S. Virgin Islands

  township                                           A governmental unit that is a functioning
                                                     minor civil division in 12 States (townships
                                                     are administrative units in Arkansas, New
                                                     Hampshire, and North Carolina). Townships in
                                                     Missouri can be either functioning
                                                     governmental units or nonfunctioning
                                                     administrative units

  unifiedSchoolDistrict                              A school district inclusive of kindergarten
                                                     through twelfth grade

  village                                            A type of incorporated place in 20 States
                                                     and American Samoa
  -----------------------------------------------------------------------------------------------

#### SpatialChangeType code list {#spatialchangetype-code-list .Heading-H4-Subclause-with-title}

> SpatialChangeType is a CodeList of values for the attribute
> changeType.

[]{#__RefHeading___Toc193613760 .anchor}Table 14 -- CodeList for
SpatialChangeType

  -----------------------------------------------------------------------
  Name                       Definition
  -------------------------- --------------------------------------------
  all                        All changes to geographic area boundaries,
                             whether due to expansion, contraction, or
                             reshape

  contraction                Decrease in the area of a geographic area
                             caused by a legal or administrative change
                             in the definition of its boundary, for
                             example, by de-annexation of adjacent
                             territory

  expansion                  Increase in the area of a geographic area
                             caused by a legal or administrative change
                             in the definition of its boundary, for
                             example, by annexation of adjacent territory

  reshape                    Change in the digital representation of the
                             boundary of a geographic area to correspond
                             to a more accurate or current survey
                             information, where there has been no change
                             to the legal definition of the boundary
  -----------------------------------------------------------------------

#### StatisticalUnitType {#statisticalunittype .Heading-H4-Subclause-with-title}

> StatisticalUnitType is a CodeList of values for the attribute
> statitsiticalUnitType.

[]{#__RefHeading___Toc193613761 .anchor}Table 15 -- CodeList for
StatisticalUnitType

  --------------------------------------------------------------------------------------
  Name                                      Definition
  ----------------------------------------- --------------------------------------------
  alaskaNativeVillageStatisticalArea        A statistical entity that represents the
  (ANVSA)                                   settled portion of an Alaska Native village
                                            for data presentation purposes

  beaEconomicArea                           A geographic entity defined by the Bureau of
                                            Economic Analysis (BEA) for purposes of
                                            tabulating, disseminating, and analyzing
                                            economic data. Each economic area consists
                                            of one or more economic nodes---metropolitan
                                            areas or similar areas that serve as centers
                                            of economic activity---and the surrounding
                                            counties that are economically related to
                                            the nodes

  blockGroup (BG)                           A statistical subdivision of a census tract.
                                            A BG consists of all tabulation blocks whose
                                            numbers begin with the same digit in a
                                            census tract

  censusArea                                A statistical entity that serves as the
                                            equivalent of a county in Alaska. Census
                                            areas are delineated cooperatively by the
                                            State of Alaska and the U.S. Census Bureau
                                            for the purpose of presenting census data
                                            for the portion of Alaska not within an
                                            organized borough, city and borough, or
                                            municipality

  censusBlock                               A geographic area bounded by visible and/or
                                            invisible features shown on a map prepared
                                            by the U.S. Census Bureau. A block is the
                                            smallest geographic entity for which the
                                            Census Bureau tabulates decennial census
                                            data

  censusCountyDivision (CCD)                A statistical subdivision of a county,
                                            established and delineated cooperatively by
                                            the U.S. Census Bureau and State, local, and
                                            Tribal officials for data presentation
                                            purposes. CCDs have been established in 21
                                            States that do not have minor civil
                                            divisions suitable for data presentation;
                                            that is, minor civil divisions have not been
                                            legally established, do not have
                                            governmental or administrative purposes,
                                            have boundaries that are ambiguous or change
                                            frequently, and/or generally are not well
                                            known to the public

  censusDesignatedPlace (CDP)               A geographic entity that serves as the
                                            statistical counterpart of an incorporated
                                            place for the purpose of presenting census
                                            data for an area with a concentration of
                                            population, housing, and commercial
                                            structures that is identifiable by name, but
                                            is not within an incorporated place. CDPs
                                            usually are delineated cooperatively with
                                            State, Puerto Rico, Island Area, local, and
                                            Tribal officials based on U.S. Census Bureau
                                            guidelines. CDPs in Puerto Rico are referred
                                            to as either comunidades or zona urbanas

  censusDivision                            A grouping of States and the District of
                                            Columbia, established by the U.S. Census
                                            Bureau for the presentation of census data.
                                            The divisions are subdivisions of the four
                                            census regions

  censusRegion                              A grouping of States and the District of
                                            Columbia, established by the U.S. Census
                                            Bureau for the presentation of census data.
                                            Each region is divided into two or three
                                            census divisions

  censusSubarea                             A statistical subdivision of a borough,
                                            census area, or other entity that is the
                                            statistical equivalent of a county in
                                            Alaska. A census subarea is similar to a
                                            census county division in other States.
                                            Census subareas are delineated cooperatively
                                            by the State of Alaska and the U.S. Census
                                            Bureau

  censusTract                               A small, relatively permanent statistical
                                            subdivision of a county or statistically
                                            equivalent entity, delineated for data
                                            presentation purposes by a local group of
                                            census data users or the geographic staff of
                                            a regional census center in accordance with
                                            U.S. Census Bureau guidelines. Designed to
                                            be relatively homogeneous units with respect
                                            to population characteristics, economic
                                            status, and living conditions at the time
                                            they are established, census tracts
                                            generally contain between 1,000 and 8,000
                                            people, with an optimum size of 4,000
                                            people. Census tract boundaries are
                                            delineated with the intention of being
                                            stable over many decades, so they generally
                                            follow relatively permanent visible
                                            features. However, they may follow
                                            governmental unit boundaries and other
                                            invisible features in some instances; the
                                            boundary of a State or county (or
                                            statistically equivalent entity) is always a
                                            census tract boundary

  combinedNewEnglandCityAndTown\            A geographic entity defined by the Federal
  Area                                      Office of Management and Budget to provide a
                                            city- and town-based area that is
                                            conceptually similar to the county-based
                                            combined statistical areas

  combinedStatisticalArea                   A geographic entity defined by the Federal
                                            Office of Management and Budget consisting
                                            of two or more adjacent core based
                                            statistical areas that have social and
                                            economic ties as measured by commuting, but
                                            at lower levels than are found among
                                            counties within metropolitan and
                                            micropolitan statistical areas

  comunidad                                 A census designated place in Puerto Rico
                                            that is not related to a municipio's seat of
                                            government

  consolidatedMetropolitanStatisticalArea   A geographic entity designated by the
  (CMSA)                                    Federal Office of Management and Budget
                                            (OMB) for use by Federal statistical
                                            agencies. An area becomes a consolidated
                                            metropolitan statistical area (CMSA) if it
                                            qualifies as a metropolitan area (MA), has a
                                            census population of 1,000,000 or more, has
                                            component parts that qualify as primary
                                            metropolitan statistical areas (PMSAs) based
                                            on official standards, and local opinion
                                            favors the designation. CMSAs consist of
                                            whole counties except in New England, where
                                            they consist of county subdivisions
                                            (primarily cities and towns)

  coreBasedStatisticalArea                  A metropolitan or micropolitan statistical
                                            area defined by the Federal Office of
                                            Management and Budget consisting of the
                                            county or counties associated with at least
                                            one urban core (urbanized area or urban
                                            cluster) of at least 10,000 population, plus
                                            adjacent counties having a high degree of
                                            social and economic integration with the
                                            core as measured through commuting

  metropolitanArea (MA)                     A geographic entity designated by the
                                            Federal Office of Management and Budget
                                            (OMB) for use by Federal statistical
                                            agencies. An MA contains a core area with a
                                            large population nucleus, together with
                                            adjacent communities that have a high degree
                                            of economic and social integration with that
                                            core. (Some MAs are defined around two or
                                            more nuclei.) MAs are defined in terms of
                                            one or more counties or, in New England,
                                            county subdivisions (primarily cities and
                                            towns). "Metropolitan area" is a collective
                                            term established by the OMB in 1990 to refer
                                            to metropolitan statistical areas (MSAs),
                                            consolidated metropolitan statistical areas
                                            (CMSAs), primary metropolitan statistical
                                            areas (PMSAs), and New England county
                                            metropolitan areas (NECMAs)

  metropolitanDivision                      A geographic entity defined by the Federal
                                            Office of Management and Budget that
                                            contains a county or group of counties that
                                            function as a distinct area within a larger
                                            metropolitan statistical area

  metropolitanStatisticalAreaPre2003 (MSA)  A geographic entity defined by the Federal
  (Definition prior to 2003)                Office of Management and Budget for use by
                                            Federal statistical agencies. A metropolitan
                                            statistical area (MSA) is a metropolitan
                                            area (MA) that is not closely associated
                                            with another MA. An MSA consists of one or
                                            more counties, except in New England, where
                                            MSAs are defined in terms of county
                                            subdivisions (primarily cities and towns)

  metropolitanStatisticalAreaPost2003       A geographic entity defined by the Federal
  (Definition as of June 6, 2003)           Office of Management and Budget consisting
                                            of the county or counties associated with at
                                            least one urbanized area of 50,000 or more
                                            population, plus adjacent counties having a
                                            high degree of social and economic
                                            integration with the core as measured
                                            through commuting

  micropolitanStatisticalArea               A geographic entity defined by the Federal
                                            Office of Management and Budget consisting
                                            of the county or counties associated with at
                                            least one urban cluster of 10,000 or more
                                            population, plus adjacent counties having a
                                            high degree of social and economic
                                            integration with the core as measured
                                            through commuting

  neighborhood                              A geographic entity, generally defined
                                            within a municipality or county, that
                                            encompasses an area in which residents
                                            recognize a common identity as expressed
                                            through social and functional ties as well
                                            as various landscape elements

  newEnglandCityAndTownArea (NECTA)         A city- and town-based geographic entity
                                            defined by the Federal Office of Management
                                            and Budget that is conceptually similar to
                                            the county-based metropolitan and
                                            micropolitan statistical areas

  newEnglandCityAndTownAreaDivision         A city- and town-based geographic entity
                                            defined by the Federal Office of Management
                                            and Budget that functions as a distinct area
                                            within a larger New England city and town
                                            area

  newEnglandCountyMetropolitanArea (NECMA)  A county-based area designated by the
                                            Federal Office of Management and Budget to
                                            provide an alternative to the county
                                            subdivision-based metropolitan statistical
                                            areas and consolidated metropolitan
                                            statistical areas in New England

  oklahomaTribalStatisticalArea (OTSA)      A statistical entity identified and
                                            delineated by the U.S. Census Bureau in
                                            consultation with federally recognized
                                            American Indian tribes in Oklahoma that once
                                            had a reservation in that State. An OTSA
                                            encompasses an area that conforms to a
                                            tribe's reservation that was dissolved
                                            preceding the establishment of Oklahoma as a
                                            State in 1907. For some OTSAs, neighboring
                                            tribes agreed to modify the boundary for
                                            data presentation purposes. Referred to as a
                                            Tribal jurisdiction statistical area (TJSA)
                                            for the 1990 census and by a single
                                            all-encompassing entity called the "Historic
                                            Areas of Oklahoma (excluding urbanized
                                            areas)" for the 1980 census

  primaryMetropolitanStatisticalArea (PMSA) A geographic entity designated by the
                                            Federal Office of Management and Budget for
                                            use by Federal statistical agencies. If an
                                            area that qualifies as a metropolitan area
                                            (MA) has a census population of one million
                                            or more, two or more primary metropolitan
                                            statistical areas (PMSAs) may be defined
                                            within it if they meet official standards
                                            and local opinion favors the designation.
                                            When PMSAs are established within an MA,
                                            that MA is designated a consolidated
                                            metropolitan statistical area (CMSA)

  publicUseMicrodataArea (PUMA)             A geographic entity for which the U.S.
                                            Census Bureau provides specially selected
                                            extracts of raw information from a small
                                            (5-percent) sample of long-form census
                                            records that are screened to protect
                                            confidentiality of census records. The
                                            extract files are referred to as public use
                                            microdata samples (PUMS). PUMAs must have a
                                            minimum census population of 100,000 and
                                            cannot cross State lines

  ruralUrbanCommutingArea (RUCA)            A geographic entity defined by the U.S.
                                            Department of Agriculture's Economic
                                            Research Service in conjunction with the
                                            U.S. Department of Health and Human
                                            Service's Office of Rural Health Policy and
                                            the Washington/Wyoming/Alaska/Montana/Idaho
                                            (WWAMI) Rural Health Research Center to
                                            represent the area associated with an urban
                                            center through various levels of
                                            commutation. RUCAs are defined in terms of
                                            census tracts

  stateDesignatedAmericanIndian\            A statistical entity delineated for an
  StatisticalArea (SDAISA)                  American Indian tribe that does not have a
                                            land base (reservation) and is recognized as
                                            a tribe by a State government, but not the
                                            Federal government. State designated
                                            American Indian statistical areas (SDAISAs)
                                            are identified and delineated for the U.S.
                                            Census Bureau by a State liaison identified
                                            by the governor's office

  superPUMA                                 A geographic entity for which the U.S.
                                            Census Bureau provides specially selected
                                            extracts of raw information from a small
                                            (1-percent) sample of long-form census
                                            records that are screened to protect
                                            confidentiality of census records. The
                                            extract files are referred to as public use
                                            microdata samples (PUMS). Super-PUMAs must
                                            have a minimum census population of 400,000
                                            and cannot cross State lines

  trafficAnalysisZone (TAZ)                 A statistical entity delineated by State
                                            and/or local transportation officials for
                                            tabulating traffic-related data---especially
                                            journey-to-work and place-of-work
                                            statistics. A TAZ usually consists of one or
                                            more census blocks, block groups, or census
                                            tracts

  tribalDesignatedStatisticalArea (TDSA)    A statistical entity delineated for the U.S.
                                            Census Bureau by a federally recognized
                                            American Indian tribe that does not have a
                                            land base (a federally recognized
                                            reservation or off-reservation trust land).
                                            A TDSA generally encompasses a compact and
                                            contiguous area that contains a
                                            concentration of people who identify with a
                                            federally recognized American Indian tribe
                                            and in which there is structured or
                                            organized Tribal activity

  unorganizedTerritory (UT)                 In a State in which the U.S. Census Bureau
                                            provides data for minor civil divisions
                                            (MCDs), the portion of a county that is not
                                            included in a legally established MCD or in
                                            an incorporated place that is independent of
                                            an MCD. For data presentation purposes, the
                                            Census Bureau recognizes such area as one or
                                            more separate county subdivisions, each
                                            designated as an unorganized territory

  urbanArea                                 A geographic entity defined to represent the
                                            extent of urban development, according to
                                            agency- or organization-specified criteria

  urbanCluster (UC)                         A geographic entity defined by the U.S.
                                            Census Bureau to identify a densely settled
                                            area having a population of 2,500 to 49,999

  urbanizedArea (UA)                        A geographic entity defined by the U.S.
                                            Census Bureau to identify a densely settled
                                            area having a population of at least 50,000

  zipCodeTabulationArea (ZCTA)              A statistical entity developed by the U.S.
                                            Census Bureau to approximate the delivery
                                            area for a U.S. Postal Service 5-digit or
                                            3-digit ZIP Code in the United States and
                                            Puerto Rico. A ZCTA is an aggregation of
                                            census blocks that have the same predominant
                                            ZIP Code associated with the mailing
                                            addresses in the Census Bureau's Master
                                            Address File

  zonaUrbana                                In Puerto Rico, a census designated place
                                            consisting of the municipio seat of
                                            government and the adjacent built-up area. A
                                            zona urbana cannot extend across its
                                            municipio\'s boundary. See census designated
                                            place, comunidad
  --------------------------------------------------------------------------------------

### SpatialRelationshipList enumeration {#spatialrelationshiplist-enumeration .Heading-H3-Subclause-with-title}

> SpatialRelationshipList is an enumeration of values for the attribute
> fromToSpatialRelationship.

[]{#__RefHeading___Toc193613762 .anchor}Table 16 --
SpatialRelationshipList enumeration

  -----------------------------------------------------------------------
  Name                       Definition
  -------------------------- --------------------------------------------
  contains                   The interior of one geographic area
                             completely includes and encompasses the
                             interior and boundary of the other
                             geographic area, so that their boundaries do
                             not intersect

  covers                     The interior and boundary of one geographic
                             area completely include the interior of the
                             other geographic area and their boundaries
                             intersect

  coveredBy                  The interior of one geographic area is
                             completely included in the interior or the
                             boundary of the other governmental unit and
                             their boundaries intersect. This is the
                             opposite of and reciprocal condition to
                             \"covers\"

  disjoint                   The boundaries and interiors of two
                             geographic areas do not intersect

  equal                      The two geographic areas have the same
                             boundary and interior

  inside                     The interior and boundary of one geographic
                             area is completely included in the interior
                             of the other geographic area, so that their
                             boundaries do not intersect. This is the
                             opposite of and reciprocal condition to
                             \"contains\"

  overlap                    The boundaries and interiors of the two
                             geographic areas intersect

  touch                      The boundaries of two geographic areas
                             intersect but the interiors do not intersect
  -----------------------------------------------------------------------

A.  []{#__RefHeading___Toc193613739 .anchor}(informative)\
    Sample map extraction and associated attribute table

> ![](media/image3.png)

[]{#__RefHeading___Toc149465879 .anchor}Figure A.1 -- Sample map

[]{#__RefHeading___Toc193613763 .anchor}Table A.1 -- Sample associated
attribute table

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------
  unitId   instanceName   instanceCode   codingSystemReference   codingSystemReference   governmentalUnitType   statisticalUnitType   typeDefinition   geometry
  -------- -------------- -------------- ----------------------- ----------------------- ---------------------- --------------------- ---------------- ----------
  1        Greenwich      0256           General Services                                town                                         A governmental   1,1\
                                         Administration                                                                               unit that is a   2, 2\
                                         Geographic Location                                                                          functioning      3,3\
                                         Codes - City                                                                                 minor civil      12,12\
                                                                                                                                      division found   1,1
                                                                                                                                      in the New       
                                                                                                                                      England States,  
                                                                                                                                      New York, and    
                                                                                                                                      Wisconsin; and a 
                                                                                                                                      type of          
                                                                                                                                      incorporated     
                                                                                                                                      place in 30      
                                                                                                                                      States and the   
                                                                                                                                      U.S. Virgin      
                                                                                                                                      Islands.         

  2        Stamford       0700           General Services                                town                                         A governmental   3,3\
                                         Administration                                                                               unit that is a   4,4\
                                         Geographic Location                                                                          functioning      13,13\
                                         Codes - City                                                                                 minor civil      11,11\
                                                                                                                                      division found   12,12\
                                                                                                                                      in the New       3,3
                                                                                                                                      England States,  
                                                                                                                                      New York, and    
                                                                                                                                      Wisconsin; and a 
                                                                                                                                      type of          
                                                                                                                                      incorporated     
                                                                                                                                      place in 30      
                                                                                                                                      States and the   
                                                                                                                                      U.S. Virgin      
                                                                                                                                      Islands.         

  3        New Canaan     0425           General Services                                town                                         A governmental   13,13\
                                         Administration                                                                               unit that is a   14,14\
                                         Geographic Location                                                                          functioning      15,15\
                                         Codes - City                                                                                 minor civil      10,10\
                                                                                                                                      division found   11,11\
                                                                                                                                      in the New       13,13
                                                                                                                                      England States,  
                                                                                                                                      New York, and    
                                                                                                                                      Wisconsin; and a 
                                                                                                                                      type of          
                                                                                                                                      incorporated     
                                                                                                                                      place in 30      
                                                                                                                                      States and the   
                                                                                                                                      U.S. Virgin      
                                                                                                                                      Islands.         

  4        Fairfield      09001          INCITS 38 - Information INCITS 31 - Information                        county                The primary      1,1\
           County                        Systems - Codes -       Systems - Codes                                                      legal division   2,2\
                                         Identification of the   -Structure for the                                                   of every State   3,3\
                                         States, the District of Identification of                                                    except Alaska    4,4\
                                         Columbia, and the       Counties and County                                                  and Louisiana.   5,5\
                                         Outlying Areas of the   Equivalents of the                                                                    6,6\
                                         United States For       United States and its                                                                 7,7\
                                         Information Interchange Outlying and Associated                                                               8,8\
                                                                 Areas for Information                                                                 9,9\
                                                                 Interchange                                                                           10,10\
                                                                                                                                                       11,11\
                                                                                                                                                       12,12\
                                                                                                                                                       1,1
  ---------------------------------------------------------------------------------------------------------------------------------------------------------------

[]{#__RefHeading___Toc193613764 .anchor}Table A.2 -- Sample spatial
relationships

  ------------------------------------------------------------------------
  fromSpUnit        toSpUnit          fromToSpatialRelationship
  ----------------- ----------------- ------------------------------------
  4                 1                 covers

  4                 2                 covers

  4                 3                 covers

  1                 2                 touch

  2                 3                 touch
  ------------------------------------------------------------------------

[]{#__RefHeading___Toc193613765 .anchor}Table A.3 -- Sample maintenance
and change types

  -------------------------------------------------------------------------
  fromMaintUnit     toMaintUnit       DeterminationType    ChangeType
  ----------------- ----------------- -------------------- ----------------
  1                 2                 coDetermined         All

  2                 3                 coDetermined         All

  1                 4                 coDetermined         All

  2                 4                 coDetermined         All

  3                 4                 coDetermined         All
  -------------------------------------------------------------------------