Transform longitude/latiude points to the Mercator projection. The main purpose of this function is to compute centroids, and to illustrate rhumb lines in the vignette.
Usage
mercator(p, inverse=FALSE, r=6378137)
Arguments
p
longitude/latitude of point(s). Can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object
inverse
Logical. If TRUE, do the inverse projection (from Mercator to longitude/latitude