[Tilecache] bad quality with 8bit AGG PNG images and metaTile=true

[Gregor at HostGIS]

Guillaume Sueur wrote:
> I would suggest you output 24bits PNG and have them reduced to 8bits
> overnight with the excellent pngnq lib. (http://pngnq.sourceforge.net/)

We do similar, and we call it "reducing" the tiles. We generate them at 
24 because it looks great, then run ImageMagick's convert to scale them 
down to 8. No visible loss of quality, but a 40% reduction in file size 
and therefore download time.

-- 
Gregor Mosheh / Greg Allensworth    BS, A+, Network+, Security+, Server+
System Administrator, Lead Programmer
HostGIS development & hosting services, http://www.HostGIS.com/

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