I am editing a layer in QGIS with severe polygon overlaps. Is there a way to delete the underlapping portions (i.e. the invisible parts) using QGIS?
If I import the layer into GRASS using the GRASS-plugin, I can get a very useful layer which contains the overlaps (polygons_2), but if I use the difference geoprocessing tool to slice the overlaps from the original file, it naturally cuts away the overlap as well as the underlap, leaving holes instead of overlaps. I have also tried the v.clean functions in grass, but the overlaps are really too big to use snapping without distorting the data.