Hi all, I'm looking for an Othodromic distance formula taking the elevation of points beside the lat/lon couples to give the metric distance between two earth surface GPS locations.
The only one I know is currently d=2*asin(sqrt((sin((lat1-lat2)/2))^2 + cos(lat1)*cos(lat2)*(sin((lon1-lon2)/2))^2)) but it only accepts lat/lon and deviation may be important by hundred of meters of height between the 2 locations (especially on short distances). Can someone help me ? Cheers ! *François Lacombe* fl dot infosreseaux At gmail dot com www.infos-reseaux.com @InfosReseaux <http://www.twitter.com/InfosReseaux>
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