On Fri, May 7, 2010 at 11:55 AM, Minko <ligfietser@online.nl> wrote:
For instance, I would like to add a statement in the points style file like addr:city which looksup the correct city name from the polygons style file, if a poi that lies within a polygon with the tags place=city/town/village (or boundary=city/..) or even landuse=residential (with a name). Or maybe even from multipolygons created from administrative boundaries (like municipalities)?
I can't add too much here, but I think it is worth mentioning that, as I understand it, the algorithm for determining if a point lies within a polygon can be quite performance intensive: http://en.wikipedia.org/wiki/Point_in_polygon There are of course libraries for dealing with this problem, but I still think the performance question is still significant. Cheers.