# Presentation: 533228

## SDTS

**PART 2**
**ENTITIES AND ATTRIBUTES**

## Spatial Phenomena

**Spatial Phenomena**

**ENTITIES**** & attributes**

**PLACE**
**New York**

**FARM**
**Dairy farm**

**WATERCOURSE**

**ROAD**

**12 meters **

- 10/19/93

## SDTS Entity-Attribute Model

**Examples**

**Entity Type = Bridge**

**Entity Instance = Brooklyn Bridge**

**East River**

**Manhattan**

**Brooklyn**

**Attribute =**
**Attribute **
**Value =**
**Standard**
**Term =**
**Included**
**Term =**

**Composition**
**Steel**
**Bridge**
**Overpass**

**. . .  a defined characteristic of entity type**
**. . .  a specific quantity or quality of attribute**
**. . .  primary label**
**. . .  a synonym**

- 10/19/93

## Spatial Objects

**0-D**

**1-D**

**2-D**

- 10/19/93

## }

**New York**

**Entity**

**Entity Instance**

**}**

**}**

**Spatial**
**Object (Point)**

**New York**

**Entity     +     Spatial Object**

**=     Feature**

**Place**

- 10/19/93

## Feature Hierarchies

**Air Lane**

**Feature Hierarchies**

**Route**

**Water**

**Land**

**Air**

**Road**

**Water**

**Land**

**Air**

**Route**

**Route:  A customary line of travel**

**Route**

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## Feature Classification

**Navigation**
**Routes**

**Feature Classification**

**Water**

**Land**

**Restricted**
**Areas**

**Obstruction**

**Bridge**

**Transportation**

**Land**
**Cover**

**Land**
**Use**

**Hypsography**

**Roads**

**Bridge**

**Bridge**

**Bridge?**

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## All Natural Language Classifications Sets Get Fuzzy

**River**

**Branch**

**Creek**

**Run**

**Kill**

**Canal**

**Stream**

**Arroyo**

- 10/19/93

## SDTS Entities

**How they are different**
**1.  Non-hierarchical**
**2.  Non-specific world view**
**3.  Entities defined by root characteristics**
**4.  Logically consistent (form & function)**
**5.  Mutually exclusive (goal)**
**6.  Labeled with a standard term**

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## SDTS Entity Type

**Watercourse:  a way or course through which water may or does flow**
**Included Terms:  river, creek, stream, branch, run, kill, canal**

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## All Natural Language Classifications Sets Get Fuzzy

**River**

**Branch**

**Creek**

**Run**

**Kill**

**Canal**

**Stream**

**Arroyo**

- 10/19/93

**WATERCOURSE**

## Use of Part 2

**Canal:  An artificial waterway or artificially improved river used for irrigation, shipping, or travel.  (Webster)**
**Canal                 Watercourse**

**Attribute:****	****	****	****Value:**
**Artificially improved/manmade****	****Yes**
**Irrigation****	****	****	****No**
**Navigable****	****	****	****Yes**
**Function****	****	****	****Shipping**

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## WHAT'S IN PART 2?	

**Alphabetical list of defined ****	****	****entity types****	****	****	****	****(200)**
**Alphabetical list of defined ****	****	****attributes****	****	****	****	****(244)**
**Alphabetical list of included ****	****	****terms****	****	****	****	****	****(1200)**

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## EXTENDIBILITY

**Current list is incomplete**
**only includes hydrography and some transportation**
**Standard entity definitions are best determined by the community that maps those entities**

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## LEVELS OF CONFORMANCE

**Standard entity types only**
**Standard entity types and included terms**
**Mixed standard entity and user-defined terms**
**User-defined terms only**

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## SPATIAL FEATURES REGISTER

**Living document for Part 2**
**On-line database**
**to be easily accessible**
**not yet implemented**
**Separate thematic specifications**
**a dictionary for hydrography features and attributes**
**a seperate one for transportation**
**etc....**

- 10/19/93

## SPATIAL FEATURES REGISTER CONTENT

**Thematic data content specifications**
**Base Cartographic**
**Cadastral**
**Cultural and demographic**
**Geodetic**
**Geologic**
**Ground Transportation**
**International boundaries**
**Soils**
**Vegetation**
**Water**
**Wetlands**
**Mapping to SDTS attribute model**

- 10/19/93

**Note: Correspond to**
**FGDC **
**Thematic**
**Subcommittees**

## SPONSORING GROUPS

**FGDC Data Category Subcommittees**
**Agent for SDTS Maintenance Authority**
**Establish thematic data content specifications**
**Others as requirements increase**
**Any agency can submit dictionaries**

- 10/19/93

## CONCLUSIONS

**General theory of spatial feature classification does not exist**
**SDTS Part 2 will increase understanding of data content in a transfer**
**Spatial features register will encourage standardization of spatial features**

- 10/19/93