[GRASS-dev] G_area_of_polygon through ctypes return 0.0

[Martin Landa]

Hi,

2013/1/20 Pietro <peter.zamb at gmail.com>:
> I'm not able to compute the area of a polygon using G_area_of_polygon,

try to call before G_area_of_polygon() fn
G_begin_polygon_area_calculations(). It should help.

Martin

-- 
Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa