Table 6.253 — DRM_Spatial_Index_Related_Geometry_Topology

Property

Description

Class
  • <DRM Spatial Index Related Geometry Topology>

Superclass

Subclass
  • None.

Definition

An instance of this DRM class specifies a spatially indexed (tiled) organization of primitive <DRM Geometry Topology> instances.

If the value of the sparse field is FALSE, all column and row entries are present; otherwise, one or more entries are not present.

The column_count field specifies the number of cells along the X axis.

The row_count field specifies the number of cells along the Y axis.

The column_width field specifies the length of a cell in the given unit along the X axis.

The row_width field specifies the length of a cell in the given unit along the Y axis.

The spacing_unit field specifies the unit of measurement used for the spacing of the spatial index.

Clarifications

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

Class diagram

Figure 6.301 — DRM_Spatial_Index_Related_Geometry_Topology

Inherited field elements

Field name

Range

Field data type

geometry_topology_level

 

Geometry_Topology_Level

Field elements

Field name

Range

Field data type

sparse

 

Boolean

column_count

 

Integer_Positive

row_count

 

Integer_Positive

column_width

 

Long_Float

row_width

 

Long_Float

spacing_unit

 

Spatial_Index_Spacing_Unit

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)

Composed of (two-way metadata) (inherited)
  • None.

Composed of (two-way metadata)
  • None.

Component of (two-way) (inherited)

Component of (two-way)
  • None.

Constraints

Example(s)

  • The set of all <DRM Geometry Topology> instances contained within an independent topological surface, organized into a collection of regularly shaped tiles.