[mapserver-users] catching GEOS errors in PHP mapscript

[Joshua Hevenor]

I'm doing a fairly simple geo-processing script in PHP but I'm running into some trouble.  I have two polygon layers and I'm trying to look up all polygons from layer A that are not disjoint from layer B.  I'm also looking at specific area so if the polygon from layer B is bigger than my map extent I'm trying to clip (using shapeobj::intersection) to the map extent.   On occasion I'm getting GEOS errors that show up in my PHP error log and kill my script. The errors are from bad shapes (things like a rectangle built wrong so that it looks more like an hour glass). Is there a function to verify the shape?  I don't see one in the PHP documentation. Can I catch these errors somehow?  

Thanks in advance, 

Josh
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