dear community first of all please accept my apologies if this is not the correct place to ask about such question.
I am trying to manipulate some geometric data using the gdal/ogr python lib and Im facing a problem when trying to transform invalid ring into valid ring. I have polygons with unclosed holes and I expected the CloseRings function to solve this for me, but unfortunately, that functions doesnt seem to do anything (in my case). see below for a simply python testcase, if you could tell me if I am possibly not using that function correctly or if there is a more correct way to do that, you would be very welcome using python version 2.6.6 osgeo ogr lib version 1.3.40 thank you very much for your attention best regards Oliver from osgeo import ogr wkt = "POLYGON ((559577.81 142165.04,559577.67 142161.79,559577.66 142161.16,559577.18 142139.0,559564.07 142140.84,559562.99 142132.4,559556.42 142134.85,559556.47 142134.96,559541.39 142140.58,559549.54 142162.4,559547.0200406529475 142163.310114102292573,559550.570425555342808 142173.455536680703517,559577.81 142165.04),(559559.95600777247455 142169.280249390256358,559550.996165407239459 142172.552877245907439,559550.996165407355875 142172.552877245907439,559547.909677243907936 142163.733065433305455,559550.443360350676812 142162.817994827404618,559542.290859716595151 142140.991299878398422,559557.417905980604701 142135.353766721702414,559557.367843619547784 142135.243629527511075,559562.407678314950317 142133.364239115995588,559563.465598454349674 142141.631689094298054,559576.497222575126216 142139.80268921770039,559576.960120304953307 142161.173134415294044,559576.970239149406552 142161.810621617711149,559577.084823867655359 142164.470624003995908,559577.084823867655359 142164.470624004025012,559570.876975534367375 142165.896950183814624,559564.754505693446845 142167.653979024267755,559564.75450569356326 142167.653979024296859,559559.956007772590965 142169.280249390256358,559559.95600777247455 142169.280249390256358),(559560.19 142169.94,559550.64 142173.43,559560.19 142169.94),(559564.97 142168.32,559560.19 142169.94,559564.97 142168.32),(559577.810000000172295 142165.04,559571.34395208011847 142166.499739240010967,559564.97 142168.32,559577.810000000172295 142165.04))" poly = ogr.CreateGeometryFromWkt(wkt) poly.IsValid() ERROR 1: IllegalArgumentException: Invalid number of points in LinearRing found 3 - must be 0 or >= 4 False poly.CloseRings() poly.IsValid() ERROR 1: IllegalArgumentException: Invalid number of points in LinearRing found 3 - must be 0 or >= 4 False _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev