Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GDB|GeoGateway+Data+Model|Vectors+(VEC)|Topology">Topology</a><hr>
<br><b>Topological Area Layers</b><br>
In addition to the topological metadata information, a topological area
layer must have the following attribute:<p>
ArcIdList: (GDBFieldTypeCountedInt) List of arc ShapeIds forming the
border of this area in clockwise order. Each ring is separated by a 
GDBNullShapeId entry in the ArcIdList. <p>
A topological area shape should have either zero or one vertex. If it has
one, it will be presumed to be an internal label point for the area.<p>
An area layer must have NODE_REF, and ARC_REF metadata pointing to the
related node and arc layers. It must also have a LAYER_TYPE of TOPO_AREAS
indicator in metadata.
<P>
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Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GDB|GeoGateway+Data+Model|Vectors+(VEC)|Topology">Topology</a><br>
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