[geos-devel] strange behaviour of LinearRing::within()

[Martin Davis]

Marco,

I suspect this is because you are expecting linear rings to "contains" 
the area they enclose. But this is not how linear rings are defined - 
they are 1-dimensional features, not areal ones.  A linear ring would 
only be "within" another one if its linework lay exactly on top of the 
other one's linework.   GEOS is behaving correctly, according to the SFS 
geometry model.

-- 
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022