icosa: rpsphere – R documentation

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rpsphere

Random point generation on the surface of a sphere

This function will create a predefined number of points randomly distributed on the surface of a sphere with a given radius.

rpsphere(n = 1, output = "cartesian", radius = authRadius, origin = c(0, 0, 0))

`n`	(`numeric`) The number of random points to be created.
`output`	(`character`) The coordinate system of the new points. Can either be `"cartesian"` for XYZ coordiates or `"polar"` for spherical, longitude-latitudes coordinates.
`radius`	(`numeric`) The radius of the sphere
`origin`	(`numeric`) The center of the sphere (XYZ coordinates).

The function uses a three dimension normal distribution to generate points, which are then projected to the surface of the sphere.

A 3-column (XYZ) or a 2-column (long-lat) numeric matrix.

randomPoints <- rpsphere(2000, output="polar")
# observe latitudinal pattern
 plot(randomPoints, xlim=c(-180, 180), ylim=c(-90, 90))

Global Triangular and Penta-Hexagonal Grids Based on Tessellated Icosahedra

v0.10.1

GPL-3

Authors

Adam T. Kocsis [aut, cre]

Initial release

2021-01-12