Table 6.207 — DRM_Proximity_Data

Property

Description

Class

  • <DRM Proximity Data>

Superclass

Subclass

  • None.

Definition

An instance of this DRM class specifies the semantic meaning of the association relationship with which it is bound. This is a spatial relationship.

The value of the distance field, which is measured in metres, represents the shortest distance between any two points of thing1 and thing2, where thing1 and thing2 are the environmental objects represented by the DRM object instances for which a relationship is being represented by the <DRM Proximity Data> instance.

Class diagram

Figure 6.253 — DRM_Proximity_Data

Inherited field elements

Field name

Range

Field data type

meaning

 

Spatial_Association_Meaning_Type

Field elements

Field name

Range

Field data type

distance

≥ 0,0

Long_Float

Default field values

Default field values for DRM_Proximity_Data

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)

  • None.

Composed of (two-way) (inherited)

  • None.

Composed of (two-way)

  • None.

Composed of (two-way metadata) (inherited)

  • None.

Composed of (two-way metadata)

  • None.

Component of (two-way) (inherited)

  • None.

Component of (two-way)

  • None.

Constraints

Clarifications

None.

Example(s)

  • Consider an aerodrome providing air traffic control and an air transportation route designed to channel air traffic into that aerodrome. The aerodrome is represented in a transmittal by a <DRM Point Feature> instance A and the air transportation route is represented by a <DRM Linear Feature> instance R. The topology of R consists of a sequence of <DRM Feature Edge> instances E1, E2, E3, and E4 that are associated to R through <DRM Edge Direction> link objects such that

    1. the endpoints of E1 are the <DRM Feature Node> instances N0 and N1
    2. the endpoints of E2 are the <DRM Feature Node> instances N1 and N2
    3. the endpoints of E3 are the <DRM Feature Node> instances N2 and N3
    4. the endpoints of E4 are the <DRM Feature Node> instances N3 and N4

    In this transmittal, N0 is associated with A and represents the location of the aerodrome, while N1, N2, N3, and N4 are aviation waypoints associated with <DRM Point Feature> instances W1, W2, W3, and W4. At each waypoint an aircraft pilot may find it useful to know the shortest distance to the aerodrome A, so each Wi has an association relationship to A through a <DRM Proximity Data> link object with meaning = IN_PROXIMITY_OF and distance = the shortest distance from that waypoint to the aerodrome.