"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