ISO/IEC 18023-1:200x(E) — Table 6.245 DRM_Spatial_Index_Related_Feature

Table 6.245 — DRM_Spatial_Index_Related_Feature_Topology

Property

Description

Class

Superclass

Subclass

Definition

An instance of this DRM class encodes a spatially indexed (tiled) organization of primitive <DRM Feature Topology> objects.

Class diagram

Inherited field elements

Field name	Range	Field data type
feature_topology_level		Feature_Topology_Level

Field elements

Associated to (one-way) (inherited)

Associated to (one-way)

Associated by (one-way) (inherited)

Associated by (one-way)

Associated with (two-way) (inherited)

Associated with (two-way)

Composed of (two-way) (inherited)

Composed of (two-way)

Composed of (two-way metadata) (inherited)

Composed of (two-way metadata)

Component of (two-way) (inherited)

Component of (two-way)

Constraints

Clarifications

¹ This is the length of a cell in the given unit along the X axis.

² This is the length of a cell in the given unit along the Y axis.

³ This is the origin of the collection, which is the lower-left corner.

Example(s)

An <DRM Aggregate Feature> can have more than one spatial organization for its topology. This allows various 'levels' or organizations. Perhaps at the 'top' <DRM Aggregate Feature> under an <DRM Environment Root>, one might find a single 10 km by 10 km spatial organization of topology spanning the entire transmittal, as well as one 500m by 500m spatial organization of topology also spanning the entire transmittal. That 'top' <DRM Aggregate Feature> would have two <DRM Spatial Index Related Feature Topology> components, one for the 10km squares and one for the 500m squares.