The data is being imported via FDO connection from oracle spatial, so we use MPolygon objects in the Map 3d 2013 drawing. So the new polygonal objects are created by mpolygon tool. While we use command “mapmpedit - Add” to merge two polygons, the result polygon seems to be made of two polygons (we can see common lines of original polygons), although it’s being selected as single object. Are there any ways to solve this problem, so we could obtain single polygon without of any additional lines in the places of joining.
As Gordon reply use the mapfeaturemerge command. If you are using FDO and connecting to the features then try to use mapmpedit on them it is checking the features out and converting (making a copy) of them as AutoCAD enities. What you may be seeing is both the orginal features from the FDO connections and the new mploygons. If you turn off the FDO layer from the display manager do you see the single mpolygon?
If I select two objects MPOLIGON and use MAPFEATUREMERGE command, I get the message "You must select at least two objects, one of which must be a feature". Oracle database is disconnected, mpolygon objects stored in dwg file.