Allows you to arrange multiple maps into one image. This is useful for showing a country together with its territories in other parts of the world (ex: showing France and Reunion island) or placing two or more countries side by side.
Usage
grid.map(left, right, center=NULL, title=NULL)
Arguments
left
Object gadm_sp
right
data.frame - data to plot
center
String - an RColorBrewer palette name or a String vector
vector of colors. Default NULL.