Table 6.176 — DRM_Perimeter_Related_Features

Property

Description

Class

  • <DRM Perimeter Related Features>

Superclass

Subclass

  • None.

Definition

An instance of this DRM class is a <DRM Aggregate Feature> instance that spatially organizes its <DRM Feature Hierarchy> components into a collection of (potentially) irregularly shaped regions, each defined by a <DRM Perimeter Data> instance. That is, each <DRM Feature Hierarchy> component is contained within the perimeter area specified by the <DRM Perimeter Data> instance associated with that component.

Class diagram

Figure 6.209 — DRM_Perimeter_Related_Features

Inherited field elements

Field name

Range

Field data type

unique_descendants

 

Boolean

strict_organizing_principle

 

Boolean

Field elements

Field name

Range

Field data type

None

   

Default field values

Default field values for DRM_Perimeter_Related_Features

Associated to (one-way) (inherited)

Associated to (one-way)

  • None.

Associated by (one-way) (inherited)

Associated by (one-way)

  • None.

Associated with (two-way) (inherited)

  • None.

Associated with (two-way)

  • None.

Composed of (two-way) (inherited)

Composed of (two-way)

Composed of (two-way metadata) (inherited)

Composed of (two-way metadata)

  • None.

Component of (two-way) (inherited)

Component of (two-way)

  • None.

Constraints

Clarifications

1An association between two <DRM Feature Representation> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

2An association between a <DRM Geometry Hierarchy> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

3An association between a <DRM Property Grid> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) represented by the <DRM Feature Representation> instance and the <DRM Property Grid> instance (or some specific cell data within that <DRM Property Grid> instance) have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. Each associated <DRM Property Grid> instance indicates whether the entire <DRM Property Grid> instance or only some specific cell data within it is participating in the relationship in question.

4An association between two <DRM Feature Representation> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

5An association between a <DRM Geometry Hierarchy> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship.

6An association between a <DRM Property Grid> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) represented by the <DRM Feature Representation> instance and the <DRM Property Grid> instance (or some specific cell data within that <DRM Property Grid> instance) have the semantic relationship indicated by the <DRM Base Association Data> link object on the association relationship. Each associated <DRM Property Grid> instance indicates whether the entire <DRM Property Grid> instance or only some specific cell data within it is participating in the relationship in question.

7The <DRM Image Mapping Function> components support texture mapping information for geometry that is to be derived from the <DRM Aggregate Feature> instance by the consumer. These <DRM Image Mapping Function> instances shall use <DRM Image Anchor> components to specify the mapping.

8A <DRM Presentation Domain> component is needed for <DRM Aggregate Feature> instances that are significant only for a particular domain, such as radar.

Example(s)

  • Consider a thematic coverage in which the spatial extent forms a collection of tiles, where some of the tiles (due to shorelines) have irregular shapes. Consequently, this coverage is represented by a <DRM Perimeter Related Features> instance, in which the boundary of each tile can be correctly represented by a <DRM Perimeter Data> link object.

    NOTE  While a rectangular tile can be described by a <DRM Perimeter Data> link object with four <DRM Location> components, an irregularly shaped tile may require a larger number of <DRM Location> components.