|
The SEDRIS Data Representation Model
APPENDIX A - Classes Feature Representation |
|---|
An instance of this DRM class represents an entity in the environment, or an organized collection of such entities, that specifies the properties of the entity in terms of its spatial connectivity.
A wide variety of spatially located entities, including roads, railroads, streams, rivers, lakes, bridges, buildings, built-up areas, forests, fields, political boundaries, powerlines, and airfields can be abstractly represented as <Feature Representation> instances. <Feature Representation> instances may be organized into thematic layers, if desired.
No. <Feature Representation> instances are conceptual entities. There are no limits on the size of a single feature, and very few limits on what can be considered to be a single feature. For example, the entire Interstate highway system of the United States could be considered to be a single high-level feature, if that were useful in a particular context. However, there are some limits on individual <Primitive Feature> instances.
|