Calculate geodesic distance between two points
May.13, 2007 in
Code Snippets, PHP
/**
* Calculate geodesic distance (in meters) between two points specified by
* latitude/longitude using Vincenty inverse formula for ellipsoids
*
* from: Vincenty inverse formula - T Vincenty, "Direct and Inverse
* Solutions of Geodesics on the Ellipsoid with application of nested
* equations", Survey Review, vol XXII no 176, 1975
* http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
*
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