References:
- https://possiblywrong.wordpress.com/2023/09/14/east-of-here/
- T. Vincenty (1975) Direct and inverse solutions of geodesics on the ellipsoid with application of nested equations, Survey Review, 23:176, 88-93, with Fortran implementation from U.S. National Geodetic Survey
- Example code using Natural Earth vector data version 5.1.1