ISO/IEC 18023-1:200x(E) — Table 6.16 DRM_Areal

Table 6.16 — DRM_Areal_Feature

Property

Description

Class

<DRM Areal Feature>

Superclass

<DRM Primitive Feature>

Subclass

None.

Definition

An instance of this DRM class is a <DRM Primitive Feature> that encloses a bounded region, such as a forest or a built-up area.

Class diagram

Figure 6.14 — DRM_Areal_Feature

Inherited field elements

Field name	Range	Field data type
None

Field elements

Field name	Range	Field data type
None

Associated to (one-way) (inherited)

None.

Associated to (one-way)

None.

Associated by (one-way) (inherited)

None.

Associated by (one-way)

None.

Associated with (two-way) (inherited)

zero or more <DRM Feature> instances¹
zero or more <DRM Geometry Hierarchy> instances²
zero or more <DRM Property Grid> instances³

Associated with (two-way)

one or more <DRM Feature Face> instances, each with a <DRM Face Direction> link object

Composed of (two-way) (inherited)

zero or one <DRM Classification Data> instance
zero or more <DRM Label> instances
zero or more {ordered} <DRM Property Set Index> instances
zero or more <DRM Property Table> instances
zero or more <DRM Property Table Reference> instances
zero or more <DRM Property Value> instances
zero or one <DRM Rendering Priority Level> instance
zero or more <DRM Colour> instances
zero or more {ordered} <DRM Image Mapping Function> instances⁴
zero or one <DRM Presentation Domain> instance⁵
zero or one <DRM Spatial Extent> instance

Composed of (two-way metadata) (inherited)

zero or one <DRM Access> instance
zero or more <DRM Cross Reference> instances
zero or one <DRM Data Quality> instance
zero or one <DRM Description> instance
zero or one <DRM Time Constraints Data> instance

Composed of (two-way metadata)

None.

Component of (two-way) (inherited)

zero or more <DRM Union Of Features> instances

Component of (two-way)

None.

Constraints

Clarifications

¹ An association between two <DRM Feature> instances indicates that they are alternate representations of the same environmental object.

² An association between a <DRM Geometry Hierarchy> instance and a <DRM Feature> instance indicates that the <DRM Geometry Hierarchy> and the <DRM Feature> are alternate representations of the same environmental object.

³ An association between a <DRM Property Grid> instance and a <DRM Feature> instance indicates that the <DRM Feature> and the <DRM Property Grid> (or some specific cell data within that <DRM Property Grid>) are alternate representations of the same environmental object. Each associated <DRM Property Grid> will indicate which is the case.

⁴ These components support “attributes for derived objects”; that is, they are used only to specify texture mapping information for geometry that is derived from the <DRM Primitive Feature> by the consumer. These <DRM Image Mapping Function> components shall use <DRM Image Anchor> components to specify the mapping.

⁵ This is needed because in many cases, a <DRM Primitive Feature> may be significant only for a particular domain, such as radar.

Example(s)

Consider an <DRM Areal Feature> representing a lake. It has a <DRM Feature Face>, which defines its size, shape, and topological relationships; <DRM Property Value> components that describe its characteristics, such as bottom composition, and a <DRM Label> that identifies it as “Duck Lake”.