[R] GIS re-mapping / polygon overlap

[Ross Ihaka]

Hisaji Ono wrote:
> Hi.
> 
>  How about GEOS available at.
> 
>  http://geos.refractions.net/
> 
> GEOS supports hole for clipping.
> 
>  I could build it in MiGW.
> 
>  However I've only executed demo codes.

Very nice reference.  I will be taking a close look through it.

The Greiner-Hormann algorithm is still pretty interesting.
The code is very simple and fast.

-- 
Ross Ihaka                         Email:  ihaka at stat.auckland.ac.nz
Department of Statistics           Phone:  (64-9) 373-7599 x 85054
University of Auckland             Fax:    (64-9) 373-7018
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