background.shape.buffer: Takes a set of points and a buffer radius, and returns
a polygon.
Code modified from Elith and Hijmans SDM with R tutorial
Description
NOTE: This function has been replaced by background.buffer.
Usage
background.shape.buffer(points, radius)
Arguments
points
A two column data frame with X and Y coordinates
radius
Radius for circular buffers to draw around points, in meters.
Value
A polygon shapefile.