[gdal-dev] OGRSpatialReference::IsSame

Frank Warmerdam warmerdam at p...
Mon Feb 18 10:44:03 EST 2002

Ben Discoe wrote:
> Either i am quite confused, or there is a rather prominent bug in
> OGRSpatialReference::IsSame() The following test:
> if( EQUAL(GetRoot()->GetValue(),poOtherSRS->GetRoot()->GetValue()) )
> return FALSE;
> ... returns FALSE if the two root node values *are* the same, rather than if
> they *aren't*. So there is a false negative result for identical
> SpatialReferences. I think the test should say "if( !EQUAL(" ...


You are right. I have commited a few fixes to the IsSame() method; however,
there are still limits to how far you should trust this method.

Best regards,
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at p...
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent

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