Stereographic projection

Transformation of spherical coordinates into the stereographic projection

Usage

stereo_coords(az, inc, upper.hem = FALSE, earea = TRUE, r = 1)

Arguments

az, inc

numeric vectors. Azimuth and Inclination in degrees.

upper.hem

logical. Whether the projection is shown for upper hemisphere (TRUE) or lower hemisphere (FALSE, the default).

earea

logical TRUE for Lambert equal-area projection (also "Schmidt net"; the default), or FALSE for meridional stereographic projection (also "Wulff net" or "Stereonet").

r

numeric. Radius of circle. Default is 1 for unit circle.

Value

two-column vector with the transformed coordinates

Examples

stereo_coords(90, 10)
#>            x            y
#> inc 0.909039 5.566258e-17
stereo_coords(90, 10, earea = TRUE, upper.hem = TRUE)
#>             x             y
#> inc -0.909039 -1.669877e-16