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"Tom Jackson" writes:
What do you mean exactly by "After geo-referencing the map files"? Well, maybe my terminology is inaccurate, but what I meant to say was, I load, and calibrate the map image. Nope, your terminology is dead on. Basically, I load the map projection information into the program (i.e., Lambert Conformal Conic, with the appropriate lat/lon info.) I got this information from one of the HTML files related to the specific map TIFF. Stop doing that! The sectionals are already GeoTIFFs. The FAA has already done all of that work for us. (They guarantee 2 pixels RMS error, but I've found distortions much greater than that.) I'm also working on making more easily-digested chunks of data. If you're in the mood to burn some time and bandwidth, you can watch my progress. http://aviationtoolbox.org/munge/mosaic.cgi Just change the extension to ".tif" on any of the images if you want a 5000 by 5000 uncompressed GeoTIFF. (I need to tweak my edge-detection algorithm. When I do, I'll clear those images and start over but you're welcome to try it anyway.) --kyler |
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