GeographicUnit

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Submitted by wendy on Mon, 11/27/2017 - 17:58
Package: 
GeographicClassification
Extends: 
Unit
Is Abstract: 
no
Is Pattern: 
no

Status:

Definition: 

A specific geographic unit of a defined Unit Type. A geographic unit may change its name, composition, or geographic extent over time. This may be tracked by versioning the content of the geographic unit. Normally a new version of a geographic unit would have a geographic (spatial) overlap with its previous version (a city annexing new area). A geographic unit ends when it is no longer a unit of the same unit type.

Example: 
The State of Minnesota from 1858 to date where the Unit Type is a State as defined by the United States Census Bureau. It has a geographic extent and supersedes a portion of the Territory of Minnesota and a portion of the Territory of Wisconsin. Minnesota territory had both a broader geographic extent, different Unit Type, and earlier time period (1849-1858) as did the Territory of Wisconsin.
Property: 
NameCardinalityDatatypeDescription
geographicTime
0..1
DateRange
The period for which the Geographic Unit is valid. Note that the geographic extent, name, or composition change within the valid period of this unit.
supercedes
0..n
SpatialRelationship
The Geographic Unit supercedes (follows immediately in time) the described geographic unit. Repeat for multiple geographic units.
precedes
0..n
SpatialRelationship
The Geographic Unit is superceded by (precedes immediately in time) the described geographic unit. Repeat for multiple geographic units.
Relationship: 
NameTarget ObjectDescriptionSource cardinalityTarget cardinalityRelationship type
hasGeographicExtent
GeographicExtent
Describes the geographic extent or coverage of the geographic unit during the specified period of time.
0..n
0..n
Neither

Stage:

DDI 3.2: 
r:GeographicLocationType
Is extendable: 
Is property: 
0
RDF Mapping: