On Fri, Apr 18, 2008 at 9:02 PM, Tom Hughes <[EMAIL PROTECTED]> wrote: > I was thinking about that while I was walking home earlier. The > main question I guess is how efficient PostGIS is at answering > the question "which of these N hundred polygons is this data > in", or how efficiently we can code the equivalent in osm2pgsql.
Getting osm2pgsql to do it on insert wouldn't be too hard once you have a table of polygon. Biggest problem is going to be that it's going to slow everything down a lot. However, when we get so far that osm2pgsql can process just diffs, then you only have to do it once and after that the load will be quite managable... > Indeed. I was thinking about that too, and I think it needs an > extrat level of indirection, so the existing stylesheet stays > largely as it is but instead of saying that a secondary road > is rendered as #213455 or whatever some sort of code name is > given and then that is mapped to the real colour based on the > country. Yeah, either mapnik needs to handle this (perhaps some kind of lookup table indirection), or we have a script that takes the current sheet and a list of (country code,tag,colour) and produces a much bigger file with all the changes... Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk