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
