2013/3/25 David J. Bakeman <[email protected]>:

> OK.  So if I take your shape file and run Vector/Geometry
> Tools/Singlepart to multipart.

Then if two parts of a feature touch each other I think it's invalid
again (as for the OGC-SFS).

> Note grass doesn't report any topo errors on either the singlepart or
> multipart shape files.

This may be due to GRASS using a different geometry model. It
validates against different criteria.

Goyo
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