A simple guide to plotting maps in R using the High-resolution map data of the World. Examples are given for plotting the whole world, a selection of individual countries, a map of the United Kingdom or adding locations to your map.
R. Rana, C. Chou, S. Kanhere, N. Bulusu, and W. Hu. Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks, page 105--116. ACM, (2010)