HB-GRAL wrote:
> Am 15.10.11 10:53, schrieb Martin Spott:

>> I think the only solution is to make GPC obsolete - either by replacing
>> GPC by something different but functional equivalent or "simply" (TM ;-)
>> by avoiding any polygon clipping in 'fgfs-construct' overall.

> Are there any concrete suggestions ?

As James wrote, one option would be to replace GPC by another clipper
(not my expertise).  The second option I am investigating is to do all
the cleaning and clipping, including cutting holes for line data and
airports into the land cover, directly in PostGIS or, preferred, GRASS,
thus obsoleting the entire vector preparation in 'fgfs-construct'

Cheers,
        Martin.
-- 
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