On 24 Nov 2008, at 15:05, Alexandre GARRAUD wrote: > Hello, > > I have set debug mode in my PG. Example if I do: > > Map m = (256.256) > ... > m.query_map_info (0,0,0) I assume you meant query _map_point in which case input parameters are : layer index, x ,y > > ==> DEBUG MAPNIK => query at point tol = -0.0117188 (-1.0) > ==> DEBUG PG => select asbinary (geom) as geom, "id", "state", "type" > from node where geom setSRID & & ( 'BOX3D(-1 0,-1 0)'::box3d, 4326 ) > > What is tolerance ? why -0.0117188 ?
Perhaps, tolerance is not a best name but it represents buffer around query point. It is calculated internally at the moment. I agree buffer parameter should be exposed. > and why BOX3D(-1 0,-1 0) ? > This is default (invalid envelope). There were many confusions regarding this approach. I'll create a ticket to have default envelope to initialise to something like : [-1,-1,1,1]. > Alexandre > HTH Artem > Alexandre GARRAUD a écrit : >> Hello all, >> >> i would like to use the method "query_map_point" with a buffer, but I >> can not find this option, there does? >> >> Alexandre >> _______________________________________________ >> Mapnik-users mailing list >> [email protected] >> https://lists.berlios.de/mailman/listinfo/mapnik-users > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
