Summary
The DRM allows terrain data to be represented in several different ways:
- Raster, as Image objects in an Image Library
- Gridded, as Property Grid objects in a Data Table Library and/or in the geometry hierarchy within the Environment Root or a Model
- Vector, as Feature and Feature Topology objects hierarchically organized within the Environment Root or a Model
- Polygonal, as Geometry and optional Geometry Topology objects hierarchically organized within the Environment Root or a Model
The DRM provides many mechanisms for hierarchically organizing Feature and Geometry objects that represent terrain:
- Spatial, Level of Detail, Classification, State, Time, etc., etc., etc.
The DRM allows multiple terrain representations of the same or different types to be associated, with attaching semantic meanings
- Alternate Representation of the same terrain
- Spatial Associations � Disjoint, Touch, Within, Overlap, Cross, Above/Below
- Proximity