On Mon, May 28, 2012 at 02:50:43PM +0200, Michiel J. van Heek wrote: > Quoting Sandro Santilli <s...@keybit.net>: ... > >How do your country boundaries look now ? :) > > They look pretty good. Most remaining trouble edges are relatively > short. Three long coastlines remain problematic: arctic Canada, > southern/eastern USA, and Brazil. (Red color in attached > screenshot.) Probably because they have some quite large islands > very close to the coastline.
"Probably" ? Dissipate any dubt, take a closer look ! Pick the Brazil coast, looks interesting. Zoom in, see the edge which was colliding in the ST_ChangeEdgeGeom error message. > If we want to handle these kind of > cases automatically, the easiest way would be to removed the > islands, but I don't like that idea, because some islands may be > very big, like the arctic islands of Canada. It is like removing > Great Britain from the map. :-) One way would be to split the edge introducing nodes making it harder for each sub-edge to collide to anything. I wonder how finding such new nodes could be automated. But we're running too much. Zoom on the Brazil coast first, and extrapolate the actual error message. Oh, note that running a second time might give you more successes, so worth reaching a "stable state" before going on. --strk; ,------o-. | __/ | Delivering high quality PostGIS 2.0 ! | / 2.0 | http://strk.keybit.net - http://vizzuality.com `-o------' _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users