geosphere: refEllipsoids – R documentation

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refEllipsoids

Reference ellipsoids

This function returns a data.frame with parameters a (semi-major axis) and 1/f (inverse flattening) for a set of reference ellipsoids.

refEllipsoids()

data.frame

To compute parameter b you can do

Robert J. Hijmans

e <- refEllipsoids()
e[e$code=='WE', ]

#to compute semi-minor axis b:
e$b <- e$a - e$a / e$invf

Spherical Trigonometry

v1.5-10

GPL (>= 3)

Authors

Robert J. Hijmans [cre, aut], Ed Williams [ctb], Chris Vennes [ctb]

Initial release

2019-05-25