R map libraries

The mapproj library allows you to project spherical maps onto the plane, in various ways. It provides two functions:

mapproject
map.grid

mapproject is compatible with the original S function of the same name. map.grid is used to visualize the effect of a projection. For examples of what you can do, see my class notes on map projections.

This library is available for noncommercial purposes only. See the DESCRIPTION file or online help for more details. It is simply a repackaging of the map projection functions written by Doug McIlroy.

Download from CRAN

The maps library which draws the maps is available from CRAN and Ray Brownrigg's ftp.

Installation

Windows

Download the zip file. In R for Windows, select menu option

Packages -> Install Package from local zip file...

Unix/Linux

Unpack the tar.gz and type:

R CMD INSTALL mapproj

Unix/Linux local install

If you don't have permission to install into the default directory, use this instead:

mkdir ~/library
R CMD INSTALL mapproj --library=$HOME/library

Then edit your .Rprofile to include the line:

.libPaths("~/library")

Usage

Once the library is installed, inside R type

library(mapproj)
help(package=mapproj)
example(mapproject)
example(map.grid)

Tom Minka

Last modified: Wed Apr 26 09:45:57 GMT 2006