for easy reference cases are described here
http://www.pkautomation.com/wgs84_geodesic_calc.html
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Hi all, in this document
http://www.faa.gov/documentLibrary/media/Order/8260.54A.pdf in Appendix 2
there are lots of calculations and algorithms for solving some useful
problems when working with non projected data e.g. EPSG 4326
There is also this github repo https://github.com/pkohut/GeoFormulas
