2010/8/31 Dražen Odobašić <[email protected]>: > On 31.08.2010 15:18, Iván Sánchez Ortega wrote: > Due to heavily corrupted dataset, polygons covering polygons which they > shouldn't, and it goes on for 15-20 layers of polygons. Resulting dataset is > visually correct, that is, resulting rasterized image is correct, because > polygons are stacked in predetermined order. > > Problem is i have a request that resulting mapnik raster should be > semitransparent, so it could be layered on top of other layers.
I ran into this issue recently when I wanted to make a semi-transparent map with OSM's processed_p shapefile, which consists of overlapping tiled sections of polygons. Since I couldn't use a transparent symbolizer, I went with option 2. - designing the map without transparency, then running a small script to go over all the tiles after they had been pre-seeded and generating the transparency with ImageMagick. This isn't a great solution if you need to be rendering images on the fly, unfortunately. -- AJ Ashton _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
