Maptitude - http://research.umbc.edu/~roswell/maptitude.html
The specifics from http://www.gpswaypoints.co.za/ are below
B5= Latitude 1
C5 = Longitude 1
D5= Latitude 2
E5 = Longitude 2
=+IF(B5<>"",INT((ACOS(SIN(B5/180*PI())*SIN(D5/180*PI())+COS(B5/180*PI())*COS(D5/180*PI())*COS(C5/180*PI()-E5/180*PI()))*180*60/PI())*100000)/100000,"")
This formula gets you to nautical miles. The application also has more
conversions to get you to meters, but I include this below, because it's
kind of interesting to look at. (For the rest, download the spreadsheet. I
can't give a URL, because it's enclosed in a frame, but following the
"Coordinate Related Calculations" link from the URL above will get you
there.
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Marjorie Roswell, Spatial Analyst
UMBC Center for Health Program Development and Management
1000 Hilltop Circle Fx: (410)455-6850
Baltimore, MD 21250 E: [EMAIL PROTECTED]
Ph: (410)455-6802 http://umbc.edu/~roswell/mipage.html
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