A week or more ago, someone posted a formula for calculating the distance
between two points using latitude/longitude. I think the formula as
incorrect. However, here is one that works perfectly;
#Evaluate(((pi()*6378)/180)*(ACos((Sin(lat_A)*Sin(lat_B)) +
(Cos(lat_A)*Cos(lat_B)*Cos(lat_A-lat_B)))))#
This yields distance in KM. If you want miles, do the calculation after the
fact, or change the value of 6378 - the earth's radius in KM - to a value
in miles.
--Dylan
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