[OSRS-PROJ] Distance between two projected points of the same grid.

[Gerald I. Evenden]

Distance calculation from grid coordinates is not recommended unless over
short distance and when scale factor is included.

Geodesic (great circle) distances require special programs.  There is a
geodesic program 'geod' in the older PROJ.4 releases but I recomment
using Vincenty's algorithm;

http://www.ngs.noaa.gov/PC_PROD/Inv_Fwd/

This site has MS procedures, FORTRAN source code and Vincenty's
paper published in Survey Review.

Again, check the above web site; it has everything one could want.

On Wednesday 22 October 2003 09:15 am, Omry Yadan wrote:
> How do I calculate the distance between two points in the same projection
> grid?
> Basically what I am asking is if all projection types are Cartesian, and if
> not, if Proj provides an API to calculate he the distance between two
> points.
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