Geographic Functions, any takers?
Francis Nugent Dixon
effendi at wanadoo.fr
Mon Aug 30 16:28:29 CDT 2010
Hi from Beautiful Brittany.
Ewan wrote :
> Compute true course and distance between points.
I don't know if I have something which may solve
part of your problems.
I travelled a lot, before retiring, and always
kept a note of cities visited, and stopovers
on the way. I decided, one day to feed all of
my data into a TRAVEL stack, to see how far I
had really travelled (finally, more than 2 million
I picked uf a file on the internet with position
co-ordinates of 10,000 cities in the world, and
than converted these co-ordinates to Lat/Long
in radians. Then with a Haversine formula, I
can calculate the distance between any two cities
in the world (in km.), with up to 6 stopovers.
example : Paris-Lisbon-Rio-London-Paris.
You can, of course, feed in co-ordinates of any
point on the globe, of any small town not in the
list of 10,000 !
If my calculations are of use, just shout !.
"Nothing should ever be done for the first time !"
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