Distance-test on UTM and LAT-LON

[Put Claude]

hi,

Some GPS freaks info...
I read of some problems for distance calculation with UTM when crossing the UTM borders. Erel advise to use LAT-LON data in place of UTM data. So, I tested at the same time the accuratie of both, UTM and LAT-LON data, calculating the distance. For LAT-LON, I used the formula from Erel 's GPS example. The results are wonderfull :
'This works GREAT. The difference between UTM data and LAT-LON data for distance calculation is:
' UTM calculate 18405 meters , while LAT_LON calculate 18357 meters, only 48 meters difference on 18400 meters,
'NOT BAD AT ALL, so from now, I use The LAT-LON data...

Put Claude Belgium

[Erel]

Note that it isn't my formula. It was taken from this link: http://williams.best.vwh.net/avform.htm
You could find many other useful formulas there.