Proposal in progress

GeographicUnitIndicator

Provides ability to declare an optional sequence or index order to a Geographic Unit

GeographicUnitTypeIndicator

Provides ability to declare an optional sequence or index order to a Unit Type describing a Geographic Unit Type. Extended to support membership in a specific level.

GeographicUnitRelationStructure

Defines the relationships between Geographic Unit Types in a collection.

GeographicUnitTypeRelationStructure

Defines the relationships between Geographic Unit Types in a collection.

GeographicUnitRelation

Describes structured relationship between Geographic Units.

GeographicUnitTypeRelation

Describes structured relationship between Unit Types used to define Geographic Unit Types. Extended to include the ability to define a Spatial Relationship using a controlled vocabulary.

GeographicUnitTypeClassification

A structured collection of Unit Types defining a geographic structure. As a subtype of CodeList it may be used directly to describe a value domain.

SpatialLine

Defines a geographic line (minimum of 2 points)

GeographicUnit

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.

SpatialRelationship

Used to specify a relationship between one spatial object and another. Includes definition of the spatial object types being related, the spatial relation specification, and the event date.

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