Polygon Topology: The representation of areas and area relationships using links and enclosed areas. Polygon topologies can also include nodes and centroids.
Polygon Topology Table
Below are four polygons (A - D) with a Node Topology Table describing their location with respect to one another. Numbered 1 - 7 are the arcs that make up the polygons. The nodes that connect the arcs are numbered I - V.
Verify that final FMU shapefile is created from a coverage that contained polygon topology built, or that it does not have gaps in the polygon boundaries.
The polygon topology table describes the arcs that bound each polygon, the node topology table describes the arcs that end at each of the nodes, ...
these systems focus on integrity of polygon topology rather than the connectivity of vector nets
applications in these areas require sophisticated analysis - simple query is relatively unimportant
users can often afford to wait for product ...
In addition, polygon topology is another important issue when implementing a GIS system.
Polygon topology allows adjacent polygons and their shared boundary to be identified.
A preliminary region has the region-arc relationship but not the region-polygon relationship. In other words, preliminary regions have no polygon topology. Coverages with preliminary topology have red in their icons in ArcCatalog.
A topological region has both the region-arc relationship and the region-polygon relationship. A preliminary region has the region-arc relationship but not the region-polygon relationship. In other words, preliminary regions have no polygon topology.
[ESRI software] An ArcToolbox command in the Coverage toolbox that creates or updates feature attribute tables and polygon topology. Build is also used to synchronize polygon User-IDs with label point User-IDs.
 See also: Polygon, Topology, GIS, Information, Database
  
|
RSS
