[OSM-dev] PNG type for Mapnik map

[Jochen Topf]

Hi!

http://svn.openstreetmap.org/applications/rendering/mapnik/generate_tiles.py
uses a call to the external 'convert' program to reduce the number of colors
for tiles rendered by Mapnik to 255. Since version r571 Mapnik supports
writing to 8 bit palette PNGs. Palette PNGs are generally smaller than
normal PNGs.

Is there any reason NOT to change the code to use Mapniks function to
write out the image directly as 8bit paletted PNG, make the images
smaller and save the call to 'convert'? (If nobody comes up with a
reason, I'll change the code.)

Jochen
-- 
Jochen Topf  jochen at remote.org  http://www.remote.org/jochen/  +49-721-388298