Ben Tuttle wrote:
Given that mapserver can't do this at the moment have you considered other options? While it probably not as efficient you might be able to set up a cron to watch your cache for new images and do a "gdalinfo -mm" on each new tile in the cache and delete tiles with only one value (ie blank tiles).
Blank tiles, or tiles with a single color are a valid case in areas with no data or in the middle of very large polygons, so I don't think that would work.
Daniel -- Daniel Morissette http://www.mapgears.com/
