2011

Table Of Contents

MAPTOPOCREATECommand Line

In Map Explorer, right-click Topologies ➤ Create

Task Pane

Create Topology dialog boxDialog Box

Cleaning Data for a Polygon Topology

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.

NOTE This functionality is for drawing objects only. There is no equivalent for

geospatial feature data. However, you can use buffers to analyze features by

proximity and perform overlay analysis on two geospatial feature layers. See

Buffering Features in Your Map (page 1306) and Overlaying Two Feature Sources

(page 1309).

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.