[Qgis-developer] CGAL in QGIS ?

Martin Dobias wonder.sk at gmail.com
Thu Jan 31 17:26:04 EST 2008


since QGIS uses GEOS library, we'd like to use primarily facilities
that we have there - it includes probably all the basic geometry
operators - so you can test geometries for relations (contains,
intersects ...) and do some geoprocessing (convex hull, buffer, union,
difference ...). Later when we start implementing some more advanced
vector analysis in QGIS core library we can start thinking of what
library to use (or whether to implement the algorihms directly).

But in meanwhile it shouldn't be very hard to create a plugin that
would use some external library like CGAL.


On Jan 30, 2008 2:54 PM, Michaël Douchin <michael.douchin at laposte.net> wrote:
> Hi all,
> After a deep research, I found the projetct CGAL, wich provides
> geometrical algorithm : voronoi diagram, convex hull, triangulation, etc.
> http://www.cgal.org/
> They provide python bindings too ( http://cgal-python.gforge.inria.fr/ )
> Do you think this could be used in qgis ? Or do you think the grass
> tools a sufficent ?
> Kimaidou
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