> @Vincent : For ArcGIS Union, please see here. > http://resources.esri.com/help/9.3/arcgisengine/java/gp_toolref/analysis_ > tools/union_analysis_.htm
ArcGIS Union resume to removing overlaps from the union of two tables. Look at the ST_DifferenceAgg() example in the PostGIS Addons: https://github.com/pedrogit/postgisaddons/blob/master/postgis_addons.sql This produce a clean table (layer) without overlaps from the union of two (polygon) tables (layers). Pierre _______________________________________________ postgis-users mailing list postgis-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/postgis-users
