On 11/12/13 19:15, Sandro Santilli wrote:
A topological approach would solve it. Simplifying a polygon may overlap with the still-unsimplified adjacent one, so you can't check after each single simplification. You could check afterwards, at the end, but then resolving one overlap on one side may introduce another overlap in the other side. Really, you need to model your data topologically, then simplify edges, rather than full polygon boundaries.
Actually, I simplified (with ST_SimplifyPreserveTopology) one edge at a time, but did not check at every step (I was under the impression that this function did preserve topology).
See http://strk.keybit.net/blog/2012/04/13/simplifying-a-map-layer-using-postgis-topology/
Thanks, this did the trick. It would be useful to add it to PostGIS. Regards, Luca Morandini Data Architect - AURIN project Melbourne eResearch Group Department of Computing and Information Systems University of Melbourne Tel. +61 03 903 58 380 Skype: lmorandini _______________________________________________ postgis-users mailing list postgis-users@lists.osgeo.org http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
