Hi,

Attached is a python script and 2 AWT-files with a polygon and
multipolygon.

The python script reproduces the following problem :

p1.difference(p2) :  shapely.geos.TopologicalError: This operation
produced a null geometry. Reason: unknown

I cannot see what causes this TopologicalError. A small change in our
geometry makes this operation working fine again.

Both polygons look perfectly correct. Can somebody with a more in-depth
expertise in Shapely and GEOS take a look at this please?

many thanks,

Emmanuel



Attachment: topologicalerror.tar.gz
Description: application/compressed-tar

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