Frank,
We currently have the whole earth split into 4 files using 1Km resolution Blue
Marble) images.
There are overviews in the images we are currently using but these do not match
exactly the output resolution we need they will be resized so there is a hit
there. We are trying to work out
I can not achieve the same quality of 8bit images in MapServer 6.0
that I was able to in 5.6. I have links to 4 example images
1. MapServer 5.6 8bit gif, I like this and this is generally what I want:
http://www.greenwoodmap.com/mapserver-image-quality/mapserv-5.6.gif
2. MapServer 6. 8bit gif.