[Proj] Distance between pair of lat / lons

[Norman Vine]

see http://trac.osgeo.org/proj/wiki/GeodesicCalculations#PROJ.4-geodprogram

On Dec 25, 2012, at 11:46 AM, Jayesh Chaudhary <aashishcy at gmail.com> wrote:

> Folks, 
> 
> We have been using GeoographicLib and it had a convenient function to calculate distance between two points with an error in the range of nm. I am familiar with PROJ4 but I don't see any such function in PROJ4. We do care about accuracy and therefore I am not willing to use simple methods that consider earth as perfect to compute such distance. 
> 
> Please let me know if there is such functionality exists in PROJ4. 
> 
> Thanks
> 
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