>> Image tiles should be 256x256 pixels in 8- or 24-bit compressed PNG format > > I understand the desire for transparency, but I'm not entirely sure > how we see it being used.
I agree that JPEG makes more sense for imagery. My guess is that the transparency info would be needed in order to merge tiles from different layers into a global layer. For example, one layer might only cover half the tile. Maybe there is another way to address this problem without depending on PNG transparency... perhaps by using the bounding box metadata? Keith _______________________________________________ talk mailing list [email protected] http://openaerialmap.org/mailman/listinfo/talk_openaerialmap.org
