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Vincenty's formulae
Used in some parts of UltraSoft3D to calculate the distance between two points on the earth's surface
https://en.wikipedia.org/wiki/Vincenty%27s_formulae
SURVEY REVIEW April, 1975
https://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
C# implementation of Vincenty's formula direct problem
https://gist.github.com/jhmt/f57c44139cf09a532c7efa60c6158913
VRML
Web 3D Consortium, defines standard VRML and X3D
https://www.web3d.org
A concise guide to using VRML
https://www.html.it/guide/guida-vrml
X_ITE X3D JavaScript WebGL browser
https://github.com/create3000/x_ite