Have you looked at the code? I rest my case....
Paul Ramsey wrote:
On Thu, Jan 29, 2009 at 8:42 AM, Martin Davis <[email protected]> wrote:
The basic approach to computing polygon overlays has been well-understood
for a long time (although this does not imply well-documented!). The
implementation however is quite tricky, especially if performance and
robustness is required. There is a notable lack of open-source existing
implementations - which should be an indication of just how difficult this
really is.
I believe the vector component of GRASS includes overlay (and of
course the raster component does too).
http://grass.itc.it/grass64/manuals/html64_user/v.overlay.html
P.
_______________________________________________
postgis-users mailing list
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
--
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
_______________________________________________
postgis-users mailing list
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
