> > and also that I couldn't get rid of the inland water bodies. Sorry, making too much work for you, I think. .. a much better way is to just use the new v.overlay functionality in GRASS 5.1(5.7) .. ? maybe not but with all the power the new vector engine has it should be possible somehow. see: http://mpa.itc.it/radim/g51/index.html Hamish