[geos-devel] What do GEOSSymDifference and GEOSIntersection (CAPI) do?

[strk]

On Wed, Feb 10, 2010 at 12:00:31PM +0100, Roger Bivand wrote:

> I've tried to go through GEOSPolygonize() to put the MULTILINESTRING 
> together again, and am analysing what has happened, but think that the 
> output has lost hole attributions, so needs running through GEOSContains 
> or similar.

Oh, if your goal is building an area you may consider
moving the algorithm implemented by PostGIS's ST_BuildArea
code down into the C-API (from the postgis geos wrapper).
I belive it would be useful in general...

--strk;

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