AutoCAD Map 3D

[#1]

Hello

I am trying to figure out how to create multi-polygons with AutoCAD Map.

Preferably I would like to create them using the closed polylines i already have in my drawings. It would even by ok to create a multiple feature shape file, then join them together in to one feature using feature edit/map tools.

I have fiddled with the "MPOLYGON" tool, but I don't seem to be able to merge another polygon (MPMERGE = Unknown command??) after i have finished the initial "MPOLYGON" command, so this is not the best solution.

If I create a multiple feature shape file, then connect to the shape file and try to edit; The "MAPFEATUREMERGE" command lets me select both objects, but then asks "Specify feature ID for us {Select/New} <Select>. The select doesn't let me select either of the features I’m trying to merge, and the "New" kicks me out of the command or says invalid entry.

I am able to merge "touching" features, but not features separated by a gap.

I figure I’m probably overlooking something very basic, so any help that can be offered is appreciated.

If I haven't explained everything properly, let me know in a reply, and I’ll try to clarify

Thanks

[#2]

Make sure your polylines are closed, look in the property palette at the closed property.

Look at using the _mapmpedit command to merge or add new boundaries to existing MPolygons.

Pay attension to the command line with all the options.

[#3]

Thanks for the quick reply

The "MAPMPEDIT" allows me to add polygons to existing polygons; which i would then map export to create a "multi-polygons" shape file (I hope i have the terminology right). Unfortunatly, the polygons objects don't work very well for how i have to have my drawing configured. Is there a way to get the same result using just closed polylines?

Or is there a way to join exsting shape file features into a "multi-polygon"?

[#4]

I'd do that by means of topologies (command _MAPTOPOCREATE).

You then _MAPEXPORT the polygonal topology as a shapefile, and finally you _MAPIMPORT it back into your main drawing, enjoying nice mpolygons as islands, holed regions, and so on.