[Qgis-developer] intersect error

Carson Farmer carson.farmer at gmail.com
Wed Jan 21 19:43:32 EST 2009

Hi gang,

Can anyone tell me why when I attempt to intersect the geometries of 
these two features[1], I get an empty geometry?

The really odd bit is that differencing or combining the geometries 
works fine... just not intersection... exporting to wkt yields nothing 
for intersection (i.e. empty), whereas exporting the difference or 
combination of the geometries prints out nicely.

[1] http://www.ftools.ca/extras/problem_features.zip

Any tips or hints are much appreciated...



Carson J. Q. Farmer
ISSP Doctoral Fellow
National Centre for Geocomputation (NCG),
John Hume Building,
National University of Ireland, Maynooth,
Co. Kildare,
Phone: +353 (0) 1 708 6726
Fax:   +353 (0) 1 708 6456
Email: Carson.Farmer at gmail.com
Web:   http://www.carsonfarmer.com/

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