Cleaning Data for a Polygon Topology
Concept Procedure Quick Reference

Clean up your data before creating polygon topology; eliminate gaps, intersections, or overlaps between any of the linework in a polygon topology. In addition, eliminate zero length objects or areas with missing centroids.

If AutoCAD Map 3D cannot create a polygon topology because the links in the polygons that cross over do not have a node where they meet, the intersections are highlighted with an X or marked with an error marker (block) that you configure. Missing centroids are also highlighted or marked in the same way.

Note The markers used to mark polygon topology errors are the same as those used to mark drawing cleanup errors. Before creating a polygon topology, AutoCAD Map 3D removes any markers present from previous drawing cleanup operations. Conversely, when you run a drawing cleanup operation, AutoCAD Map 3D removes any markers present from creating a polygon topology.
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