GeographicLevelType
Describes a level within the GeographicStructure. In addition to a name and description, provides one or more GeographicLevelCodes by which it is identified with specified system, any coverage limitations, and parent position within a single hierarchy or if it is the result of layering multiple hierarchies, the lowest component level for each of the layering hierarchies. Allows for an indicator declaring that coverage of the parent level is or is not exhaustive.
Properties
Name |
Type |
Description |
|
|---|---|---|---|
GeographicLevelName |
0..n |
A name for the GeographicLevel. May be expressed in multiple languages. Repeat the element to express names with different content, for example different names for different systems. |
|
Description |
0..1 |
A description of the GeographicLevel. Supports multiple language versions of the same content as well as optional formatting of the content. |
|
GeographicLevelCode |
0..n |
A code and its authorization source for identifying the level within a specific system. |
|
CoverageLimitation |
0..1 |
Describes a limitation of the coverage such as all objects of a specific type that meet population size requirements (i.e., All Places with a population of 10,000 or more). |
|
PrimaryComponentLevel |
0..n |
Provides references to the base level elements that are used as building blocks for composed geographies. For example, Metropolitan areas that are composed of counties except in the New England States where they are composed of county subdivisions, or School Attendance Boundaries (SABINS) built from Census Blocks. This structure allows for specifying the basic building block for composed areas and any restrictions (coverage limitations). The field may be repeated to provide alternate information on the basic building blocks for areas outside of the coverage limitations described. |
|
ParentGeographicLevelReference |
0..n |
Reference to a single containing (parent) geography. |
|
IsExhaustiveParentGeographicLevel |
0..1 |
Indicates whether the geographic level completely fills its parent level. Counties are exhaustive within States. Places are NOT exhaustive within States. |
|
GeographicLayerBaseReference |
0..n |
Use for geographic polygons that are the result of layering two or more geographic hierarchies where the polygon being described is the intersect of the layers. For example: State - County - County Subdivision - Place/Remainder - Tract [The portion of a tract that is within a single place (or non-place area) and a single county subdivision] This polygon is made by overlaying the following three geographic hierarchies: 1) State - Place, 2) State - County - Tract, and 3) State - County - Subdivision. The three GeographicLayerBase elements would point to Tract, Place, and County Subdivision. |
Properties Inherited from IdentifiableType
Name |
Type |
Description |
|
|---|---|---|---|
URN |
1..1 |
The URN of the entity matching the DDI URN pattern associated with the value of the attribute typeOfIdentifier (Canonical or Deprecated). |
|
Agency |
1..1 |
This is the registered agency code with optional sub-agencies separated by dots. |
|
ID |
1..1 |
The ID of the object. This must conform to the allowed structure of the DDI Identifier and must be unique within the declared scope of uniqueness (Agency or Maintainable). |
|
Version |
1..1 |
The version number of the object. For the identifiable object this is the version number of its parent versionable at the point of creation or alteration of the non-administrative metadata of the identifiable. Versionable and Maintainable items increment their version number whenever the non-administrative metadata contained by the object changes. |
|
UserID |
0..n |
Allows for the specification of identifiers other than the specified DDI identification of the object. This may be a legacy ID from DDI-C, a system specific ID such as for a database or registry, or a non-DDI unique identifier. As the identifier is specific to a system the system must be identified with the UserID structure. |
|
UserAttributePair |
0..n |
A system specific user defined property of the object expressed as a key/value pair. As this is specific to an individual system the use of controlled vocabularies for the key is strongly recommended. |
Item Type Hierarchy
- IdentifiableType
GeographicLevelType
Relationships
The following identified item types reference this type.
