[email protected] wrote: > I was assuming that the sql filter only does pre-filtering for > performance reasons, and that simply applying a generic filter on the > whole data could produce the same result
You assumption is wrong. The SQL queries also perform some data munging. - yes/true/1 -> yes for bridges/tunnels - siding/spur/yard -> siding-spur-yard (for railway/service) And there's more to come now that mapnik 0.7.0 has been tagged and will be released soon. You're also missing out on the way_area column that is calculated by osm2pgsql during import, and it also performs some z_order ordering. Converting the current osm.xml for the OSM plugin is not an impossible task yet, but don't keep your hopes up for what's still to come. > Then wouldn't it be possible to implement an automatic conversion of > strings to numeric when a comparison operator is encountered ? The Datasource OSM plugin only delivers data to mapnik proper. It has no knowledge of which types of comparisons are being performed on that data. -- Lennard _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
