Thursday 16 of April 2009 11:58:00 Carson Farmer napisał(a): > Hi Felix, > > Hello, > > > > I have a postgis table with large polygons. For some of them postgis' isvalid function returns false > > Is there a way to spot these self-intersection places easily? > > > One roundabout way to do this would be to use the 'polygons to lines' > tool in fTools to convert your polygons to lines, then use the > 'intersect lines' tool (in fTools) to find intersections between the new > line layer (use the line layer as both input and intersect layer). > > I haven't tested this myself, but in theory in should work...
Unfortunately it doesn't find self-intersections... Such tool would be worth of its weight in gold anyway :) _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
