Geodesy problems and their solutions.
$ cargo run
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London: (51.5007°, -0.1246°)
New York: (40.6892°, -74.0445°)
Distance LON -> NYC: 5574840.457
Inverse Solution LON NYC (s=5574840.457, az1=-73.77°, az2=236.24°)
DMS: 90°12'0.999"
Vincenty 1975 Published Data Checks
(55.75°, 0°) to (-33.43333333333333°, 108.21666666666667°) = 14110526.170 ± 14110526.170
(37.331931575000006°, 0°) to (26.128566516666666°, 41.47652980277778°) = 4085966.703 ± 4085966.703
(35.26979128333333°, 0°) to (67.37077121666665°, 137.79119843055557°) = 8084823.839 ± 8084823.839
(1°, 0°) to (-0.9683803444444445°, 179.29667499166666°) = 19960000.000 ± 19960000.000
(1°, 0°) to (1.0208859777777777°, 179.7716229°) = 19780006.558 ± 19780006.558