Hi. My last question about PNG compression was answered perfectly. thanks to all responders.
One of the things we are trapped in is satellite view for our slippy map.( we want to have hybrid) We got the files from quickbird satellite in TTF (GeoRefrenced). like 700 Square Km. The whole city is like 18 Gigabyte in Size. I mean the size of single colorful TTF file. We tested mapnik against that big TTF file and used the GeoRefrenced TTF as a source for mapnik layer. The problem is the size of TTF when mapnik wants to make a tile in a specific zoom. We have 8 GIG of ram in Debian, but still we are in lack of memory. I think mapnik tries to open up the TTF file, but since it is so much big, it fails. it is logical. The solution would be slicing the TTF into smaller files. We tried even with 1 GIG files, but still fails. so my question is that : What is the technique for rendering satellite imagery when you handle large ttf files. If the answer is slicing, then what happens to edges between two tiles when one part is in TTF1 and the second part is in TTF2...how can we tell mapnik to use which TTF file...things are a bit vague..how many slices we should make ! thanks Alireza
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