ISO/IEC 18023-1:200x(E) — Table 6.76 DRM

Table 6.76 — DRM_Feature

Property

Description

Class

<DRM Feature>

Superclass

<DRM SEDRIS Abstract Base>

Subclass

Definition

An instance of this DRM class represents an entity in the environment (or a hierarchical collection of such entities) so as to abstract away all spatial information that is not needed to reason about that entity in terms of its spatial connectivity.

Class diagram

Figure 6.87 — DRM_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)

None.

Associated with (two-way)

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

Composed of (two-way) (inherited)

None.

Composed of (two-way)

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

Composed of (two-way metadata) (inherited)

None.

Composed of (two-way metadata)

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

Component of (two-way) (inherited)

None.

Component of (two-way)

zero or more <DRM Union Of Features> instances

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.

Example(s)

A wide variety of spatially located entities, including roads, railroads, streams, rivers, lakes, bridges, buildings, built-up areas, forests, fields, political boundaries, powerlines, airfields, etc. can be abstractly represented as <DRM Feature> instances. <DRM Feature> instances may be organized into thematic layers, each forming a separate topological surface.