On Wed, Mar 14, 2012 at 10:11:13AM +0100, William Humphrey Temperley wrote:
> I recently did this for the Global Administrative Unit Layers (GAUL) stored > in PostGIS using the simplify polygon tools in ArcGIS. Whilst I'd love to > use the new topology tools Sandro has developed, this wasn't practical at > this time. > > The steps I took were: > 1. Simplify the smallest (admin2) units using the Simplify Polygon tool, > asking it to resolve topological errors. > 2. Dissolve the generalized polygons on their parent id > 3. Repeat 2 until I arrived at admin0 > > Each time I had to reload the new geometries back into PostGIS. You missed this step: 0. buy an ArcGIS license. > Will Temperley > Spatial Database Developer > Land Resource Management Unit > European Commission - Joint Research Centre You know I've been working at the JRC for 1 year ? Had to wait to get out of there in order to bring some love to the PostGIS topology support. Not a single euro was spent by the EC on it. Not even a slot of the pledge [1] was taken. [1] http://pledgebank.com/postgistopology On the other hand milions are spent by JRC on Oracle and ESRI licenses so I guess "practical" is really a subjective matter. --strk; ,------o-. | __/ | Delivering high quality PostGIS 2.0 ! | / 2.0 | http://strk.keybit.net `-o------' _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users