How to plot polygons with holes - holes are encoded by coordinates going anticlockwise, and overplotting is avoided by re-ordering the order in which polygons are plotted.
This example is retained for historical interest only, other solutions are present in the sp package.
Usage
data(gpcholes)
Details
"Date: Tue, 11 May 2004 12:54:20 +0900
From: Hisaji ONO
To: r-help
I've tried to create a polygon with one hole by gpclib using following
example script.