[GRASS5] Re: [GRASS-CVS] eric: grass/src/mapdev/v.out.shape extract.c,1.8,1.9

[Eric G. Miller]

On Fri, Oct 04, 2002 at 09:58:52AM +0200, Markus Neteler wrote:
> Hi Eric,
> 
> thanks for fixing the memory corruption bug: now commands like
> 
> v.out.shape areamap type=area
> 
> do no longer crash. But... :-)
> If the map contains islands, they are still filled by the surrounding
> area. 
> 
> If ever possible, maybe somebody could look into that (or I
> am missing something, probably islands in SHAPE are a problem?
> Note that I checked the SHAPE file with Arcexplorer for Linux,
> maybe the problem is there).

Islands are presumably holes and need to have their direction reversed.
Shapefiles use a winding rule to determine interior/exterior boundaries.

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