I have a shapefile containing features with duplicate geometries, but different attributes (e.g. a polygon with attribute XX, and an identical polygon with attribute XY). I want to identify the duplicates, then pick the one with the correct attributes, deleting the other.
I've tried topology tools in OpenJump/Kosmo, but without success. They have a 'delete duplicates' tool that does what I want, except seems to arbitrarily delete one of the features rather than letting me pick which one to keep.
I have access to QGIS, OpenJUMP, Kosmo, etc. and am able to install other open source/free tools if required.