Hi, Mapnik is correctly generating the tiles for me. I am trying to figure out if Mapnik can tell me if the tile (or map I generated) is empty(i.e. there is no information in the tile). I have a sparse map with few polygons covering less than 50% of the total map rendered.
The empty tiles have small size so that would be one heuristic. I am hoping there is some better way: either Mapnik can tell me or may there is some imagemagick or some other tool that can check that all the pixels in the png are transparent(I am using transparent background). I am currently using generate_tiles.py. Would appreciate any pointers. In past I have benefited from suggestion for workarounds on this list, even if there is no direct solution. Happy Holidays! HB
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