[R-sig-Geo] extracting the non-overlapping part of a polygon?

[rundel]

You can accomplish this easily with rgeos. The function gDifference will
return the part of polygon A outside of polygon B. The following code should
get you what you need, some additional cleanup may be necessary since the
two polygons dont overlap very well.

library(rgeos)
greek_cy = gDifference(cy,tuc)

You will have to install the geos library and then the rgeos package from
source (you can download the source from r-forge) to use the package. If you
run into any problems let me know.
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