On 08/11/2011 06:43 PM, Thomas Orozco wrote:
> The distance is: Sqrt( Sqr(lat1-lat2) + Sqr(long1-long2) )

Try the formula close to the poles and you notice that there is
something missing.

Your formula is correct on a flat surface but (there you talk about x
and y and not about lattitude and longitude)  and should be rather
correct  close to the equator


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