I'm trying to convert a polyline shapefile into a polygon shapefile. The polylines are all sort of circular shaped. When the polyline is not closed and is not crossing itself it is easy to do. Just add the point of the polyline to the new polygon and add the first point as the last point to close the polygon. When the polyline segments cross each other it is much more difficult to create a valid polygon.
I was wondering if such a method would already be invented by the GDAL/OGR/GEOS team. Thanks, Paul The Netherlands
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