When I created this map cache I used "PNG8" for my Cache Tile Format. I am working with ArcServer and Desktop version 9.3. I have read that JPEG is best for raster imagery; however, I have also read that JPEG does not support transparency and I can not have a black background surrounding the aerial imagery. All these things considered which Cache Tile Format would provide the best image quality without any black background pixels: PNG8, PNG24, PNG32, or JPEG?
The process takes so long to run, I would rather not learn by trial and error. Any help would be greatly appreciated!