After importing your shapefile in GRASS 7 (True topology, it detects and eliminate the defective polygon)
before > cam@data$id = rownames(cam@data) > cam.points = fortify(cam, region="id") Error: IllegalArgumentException: Invalid number of points in LinearRing found 3 - must be 0 or >= 4 after > cam@data$id = rownames(cam@data) > cam.points = fortify(cam, region="id") -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Dealing-with-defective-polygons-tp5265833p5265972.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: http://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user