Thanks Frederik. I had tested pngnq before. the result is a bit better than imagemagick in some PNGs... Should do a same test on a same PNG with the other 2 as well.. I will publish the results soon: ImageMagick, PngCrush, OptiPng, Pngnq and photoshop.
I wish one day mapnik could make the most compressed png for us. A lot of computation power will be saved. Alireza Have a look at pngcrush, optipng, or pngnq. > > Bye > Frederik >
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