Converting Polygon Topology to Polygons
Concept Procedure Quick Reference
 
 
 

You can create polygons from a polygon topology. The polygon topology is not changed.

When exporting objects to other formats, use polygons to preserve information about islands, holes, or discontinuous polygons.

Here are some typical situations in which you may want to create polygons from a polygon topology.

This illustration shows a polygon topology. You can create polygons for each polygon in the polygon topology, which is useful when exporting to other formats.

This illustration shows lakes as part of a state topology. To create a polygon for the state with "holes" in it for the lakes, select the Group Complex Polygons option.

Converting Polygon Topology with Nested Boundaries

When you have nested polygons in your topology, you have several options on how to convert them.

If you select the Group Complex Polygons option and all the polygons have centroids, AutoCAD Map 3D will create a single balanced polygon.

If you do not select the Group Complex Polygons option, AutoCAD Map 3D will create separate polygons, one for each centroid.

To create a single polygon from polygons nested within each other, each nested polygon must have a centroid. For example, if you have three polygons nested one within another, and the middle polygon does not have a centroid, AutoCAD Map 3D will create separate polygons for the inner polygon and the outer polygon.

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