If you have data attached
to polygon objects or closed polylines, you can create centroids
for the polygons or closed polylines and move the data to the centroid.
This is useful after
you import or digitize objects, before using editing commands such
as Drawing Cleanup, Map
Break, or Map Trim, or when working with
Object data attached
to closed polylines (above) and object data moved to centroids (below).
When you use this feature, AutoCAD Map 3D checks
that the selected polygons or closed polylines are clean; that is,
that the lines do not intersect each other, and that the area is
greater than 0.
It creates a centroid
inside each selected polygon or closed polyline and moves any object
data or SQL link data to the centroid. For a 'figure eight' object, AutoCAD Map 3D creates
Centroids are created
with a Z value of 0.