> Hi all, > > I just noticed a strange behaviour when trying to render 8-Bit PNGs: > Mapnik seems to stop drawing features when it runs out of colors (or at > least that is my interpretation so far).
OK I just found the documentation on http://trac.mapnik.org/wiki/OutputFormats I did Google around yesterday but somehow didn't find this. Sorry for the noise. Flo > > It's best illustrated with the attached tiles - the first was saved as > 24-Bit PNG, the other one as 8-Bit using > > mapnik.Image.save(uri, 'png256') > > (in the context of OSM's generate_tiles.py) > > I would have expected the latter to be dithered or otherwise distorted, > but I cannot explain to myself why parts of distinctive layers (roads > and rivers in the upper part of the image) are omitted, especially given > that the colors used there are present in the rest of the image. > > Can anyone explain to me what is going on here? Or even better give some > hints or pointers to code how this could be fixed/avoided. > > Best, > > Flo > _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
