[Proj] Distance calculations

Hamish hamish_b at yahoo.com
Fri Oct 17 05:08:01 EDT 2008

OvV_HN wrote:
> Let's throw in Saito.
> Tsutomu Saito, The computation of long geodesics on the ellipsoid through 
> Gaussian quadrature, Bull. Geod. 53 (1979), pp. 165-177

As long as we are throwing things in, I might as well point to the code
that GRASS is currently using:


 Distance from point to point along a geodesic code from Paul
 D. Thomas, 1970 "Spheroidal Geodesics, Reference Systems, and
 Local Geometry" U.S. Naval Oceanographic Office, p. 162
 Engineering Library 526.3 T36s

at least that one is easy to test :)

I am wondering if someone did set up a horse race between all these
various solutions, what would be the criteria to judge them on?
-computational time and difference from the "gold standard"?


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