Hi all, there is a new addon v.clean.ogr that imports a single OGR layer with polygons, cleans the polygons, and exports the polygons again. Any overlaps are exported as a separate OGR layer.
This tool should only be used with polygons that are not supposed to overlap. For example, administrative boundaries in NUTS 2013 [0] correctly overlap in layer UTS_RG_60M_2013_3035 because this layer contains several levels at once. A particular level can be selected during import or with v.clean.ogr with the where option, e.g. where='LEVL_CODE = 0' selects country borders which are not supposed to overlap. Markus M [0] http://ec.europa.eu/eurostat/cache/GISCO/distribution/v2/nuts/download/ref-nuts-2013-01m.shp.zip
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