Since d.what.vect contains a bug (it doesn't recognise the
presence of islands in a polygon) I would like to add this
to the wish list for grass 4.2. It can't be too hard to
have the program search for other labels with coordinates
in the polygon under investigation, then subtract the areas and
add the perimeters of those polygons. Of course this would have
to be nested, to catch the `islands within islands'.
Martijn van Leusen