ISO/IEC 18023-1:200x(E) — Table 6.77 DRM_Feature

Table 6.77 — DRM_Feature_Edge

Property

Description

Class

<DRM Feature Edge>

Superclass

<DRM Feature Topology>

Subclass

None.

Definition

An instance of this DRM class is a one-dimensional <DRM Feature Topology> instance consisting of an ordered collection of <DRM Location> instances connecting one <DRM Feature Node> to another <DRM Feature Node>. The orientation of a <DRM Feature Edge> is defined by the order of its <DRM Location> components, taken in conjunction with its starting <DRM Feature Node> and ending <DRM Feature Node>.

A <DRM Feature Edge> is used to represent the location of a segment of either

one or more <DRM Linear Feature> instances,
a boundary of one or more <DRM Feature Face> instances, or
both.

Class diagram

Figure 6.88 — DRM_Feature_Edge

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)

zero or more {ordered} <DRM Feature Face> instances¹

Associated by (one-way) (inherited)

None.

Associated by (one-way)

zero or more <DRM Feature Face Ring> instances, each with a <DRM Edge Direction> link object²

Associated with (two-way) (inherited)

None.

Associated with (two-way)

zero or more <DRM Feature Edge> instances
exactly 2 {ordered} <DRM Feature Node> instances, each with a <DRM Edge Direction> link object³
zero or more <DRM Feature Volume> instances⁴
zero or more <DRM Linear Feature> instances, each with a <DRM Edge Direction> link object

Composed of (two-way) (inherited)

zero or more <DRM Property Value> instances

Composed of (two-way)

zero or more {ordered} <DRM Location> instances

Composed of (two-way metadata) (inherited)

None.

Composed of (two-way metadata)

None.

Component of (two-way) (inherited)

zero or more <DRM Union Of Feature Topology> instances

Component of (two-way)

None.

Constraints

Clarifications

¹ These are the <DRM Feature Face> instances (if any) that are bordered by the given <DRM Feature Edge> instance, ordered counterclockwise when looking along the <DRM Feature Edge>.

The converse of this relationship is that between <DRM Feature Face Ring> and <DRM Feature Edge>.

² This association specifies that the <DRM Feature Face Ring> is “bounded by” the given <DRM Feature Edge> instance.

³ This association specifies that the given <DRM Feature Edge> instance is “bounded by” these two <DRM Feature Node> instances.

The first <DRM Feature Node> is the starting node of the <DRM Feature Edge>, while the second <DRM Feature Node> is the ending node.

⁴ The <DRM Feature Volume> that contains the <DRM Feature Edge>, if any.

Example(s)

A <DRM Linear Feature> representing the centreline of a road would be defined by one or more <DRM Feature Edge> instances. The border of a forested area would be defined by a collection of one or more <DRM Feature Edge> instances.