Spatial Index Data

The SEDRIS Data Representation Model APPENDIX A - Classes Spatial Index Data

Class Name: Spatial Index Data

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class specifies the (1-based) row and column indices of a cell within a regular spatial relationship of cells. < Spatial Index Data> instances are used within spatial-index-related organizations to distinguish sibling branches of the organizations.

Given the origin of the spatial-index-related organization instance, and the row and column widths defined by that organization instance, the location of any cell is easily determined from its <Spatial Index Data>.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

See Spatial Index Related Organizing Principle, < Spatial Index Related Features>, < Spatial Index Related Geometry>, < Spatial Index Related Feature Topology>, and < Spatial Index Related Geometry Topology> for examples.

FAQs

No FAQs supplied.

Constraints

None.

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_Integer_Positive	row_index;
SE_Integer_Positive	col_index;

Prev: Spatial Domain. Next: Spatial Index Related Feature Topology. Up:Index.

Last updated: October 1, 2002