[postgis-devel] topology : finding if the ring is an inner ring or outer ring

[Sandro Santilli]

On Fri, Feb 20, 2015 at 11:26:16AM +0100, Rémi Cura wrote:
> Thanks,
> I wanted to avoid the computing of winding.
> 
> But now I doubt it is possible.
> Instead of winding I chose to compute signed area, because I'm afraid
> robust winding may be difficult.

Indeed I was thinking about exposing some function to allow computing
signed area of single edges. Maybe ST_SignedArea ?

See http://trac.osgeo.org/postgis/ticket/1498, comments welcome there.

--strk;