background.raster.buffer: Takes a set of points, a buffer radius, and a mask and returns
a raster based on that buffer radius.
Code modified from Elith and Hijmans SDM with R tutorial
Description
NOTE: This function has been replaced by background.buffer.
Usage
background.raster.buffer(points, radius, mask)
Value
A raster object with values of 1 in every grid cell falling within the buffer.
Arguments
points
A two column data frame with X and Y coordinates
radius
Radius for circular buffers to draw around points, in meters.