The SEDRIS Data Representation Model
APPENDIX A - Classes
Perimeter Related Feature Topology
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Class Name: Perimeter Related Feature Topology
Subclasses
This DRM class is concrete and has no subclasses.
Definition
An instance of this DRM class is a
<Feature Topology Hierarchy>
that spatially organizes its components
into a collection of (potentially) irregularly shaped regions, each
defined by a <Perimeter Data> instance.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
This class appears on only one page of the DRM class diagram.
Example
- The geographic extent of a thematic coverage might be divided up into a
collection of tiles. Due to political boundaries or shorelines, some of
these tiles might have irregular shapes. The
<Feature Topology> instances contained within
each tile would be organized into one of the components of a
<Perimeter Related Feature
Topology> instance.
FAQs
- May the regions defined by the components of a
<Perimeter Related Feature
Topology> instance overlap?
- No. The regions defined by the components of a
<Perimeter Related Feature
Topology> instance should fully partition the topological surface.
- May the same <Feature Topology> instance
be contained within more than one of the components of a
<Perimeter Related Feature
Topology> instance?
- No. The organization of <Feature Topology>
instances is strict, such that each <Feature
Topology> instance shall be located within the region defined
by a single component.
Constraints
Composed of (two-way)
Component of (two-way)(inherited)
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Last updated: October 1, 2002
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Copyright © 2002 SEDRIS™
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