Hi, I'm interested to know if anyone has developed an approach with Mapnik to draw layers manually (i.e. using graphics primitives directly) rather than going through the existing symbolizers. My interests is to take a map (via a shapefile, or postgis data source) and overlay structural, in my case non-cartographic/topological, data over top of it using the coordinate space from the map. I've devised a way to do this by inserting my markup into a postgis datasource and then rendering that as a layer. It works but is a bit clunky and doesn't allow for easy programmatic control of the drawing - it also makes certain kinds of drawing operations very challenging. In my case I am drawing arc segments between points with arrowhead caps.
Ideally the next step would be to expose a layer with graphics primitives through the API (in my case Python). I've looked at the source already and don't see anything heading in this direction, however, I'm curious if this is something that people have played with? I'm going to start hacking on the current 0.51 source to see investigate the feasibility of this change but would love any guidance that others may have. Thanks, Kevin _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
