Okay, here's a small sample of the data I can extract from my GPS

36.663116030395031 -92.902936963364482 353.899999999999977 2011-12-30T22:19:27Z
36.663144025951624 -92.902942998334765 354.860000000000014 2011-12-30T22:19:39Z
36.663215020671487 -92.902968982234597 358.70999999999998 2011-12-30T22:20:08Z
36.663261959329247 -92.902940986678004 360.149999999999977 2011-12-30T22:20:23Z
36.663261037319899 -92.902955990284681 359.670000000000016 2011-12-30T22:21:10Z


We have the lat, long, elevation, and a timestamp to work with.

I'm not sure what format the elevation is in. It can't be feet above sea level because I haven't been that low for a long time, so it must be meters.

We also have to look up how to calculate feet using the lat/lon method shown. I think I might have the math for that in some code I was playing with for my radar web app.

I think it'd be fun to give it shot. You're never going to be boots on the ground accurate with the civilian grade GPS we have now, but it'd be fun to measure distance with a home rolled algorithm



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