Matt, Mapnik's png256 format does not support opacity AFAIK.
Could you file a trac ticket? Dane On Jan 29, 2009, at 11:21 AM, Matt Bartolome <[email protected]> wrote: > Hi, this is a tilecache + mapnik question. > > I'm wondering if it is possible to set a nodata value to transparent > when rendering raster data with png256 in tilecache. I wanted to use > the png256 extension in my tilecache.cfg but when the bounding box > exceeds the raster I get a black boundary for the missing data. With > the default extension (regular png) in tilecache it is transparent so > the black doesn't show up however each tile can be upwards of 200K, > which I am currently using pngnq to compress. It would be nice if it > could be accomplished in one swoop. > > -Matt > _______________________________________________ > 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
