glow (version 0.13.0)

mollweide_projection: mollweide_projection

Description

Performs a cartographic mollweide projection from polar coordinates (latitude/longitude) to X-Y map coordinates

Usage

mollweide_projection(latitude, longitude, meridian)

Value

X/Y coordinates

Arguments

latitude

Latitude (aka declination) of points

longitude

Longitude (aka right ascension) of points

meridian

The x=0 center of the plot

Details

This function uses the "Newton-Raphson with fast convergence everywhere" algorithm.

Latitude and longitude should be in units of radians not degrees. Latitude ranges from +/- pi/2 and longitude ranges from +/- pi.

See Also

https://en.wikipedia.org/wiki/Talk:Mollweide_projection

Examples

longitude <- pi / 4
latitude <- pi / 4
mollweide_projection(longitude, latitude, meridian = 0)