The SEDRIS Data Representation Model
APPENDIX A - Classes Linear Feature |
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An instance of this DRM class is a <Primitive Feature> instance with a one-dimensional structure such as a road, a stream, or a power line.
Consider a <Linear Feature> instance representing a road as depicted in Figure 6.27:
This <Linear Feature> instance has an ordered set of <Feature Edge> instances defining the 2D or 3D path of its centreline. The <Classification Data> component identifies it as a road, while the <Property Value> instances describe the characteristics of the road.
NOTE Individual segments of the road with different surface characteristics can each be attributed with their own <Property Value> components.
Yes. However, these <Feature Edge> instances shall form an ordered sequence, such that each consecutive pair of <Feature Edge> instances share a common <Feature Node>. Also, any properties of the feature shall remain the same throughout its length. For example, a single road feature (Interstate 95) could conceivably consist of a linear sequence of hundreds or thousands of <Feature Edge> instances.
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