I have successfully loaded all the PUMA geographies in the US, and would like to calculate their distance matrix. Since st_distance on a polygon of these sizes is sort of a nightmare, I thought I would calculate the centroid and then get the distances between those. However, st_centroid(geography, geography) is not available....
So, is there a better way? Should I reproject to 4326 and use st_distance_sphere? Or ??? Thanks to all the folks that have made such a cool thing as PostGIS happen! _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
