I have a group of counties in a SpatialPolygonsDataFrame and would like to know if a function exists to scale them.  Many of the counties share a common border, and I want to color each county's border differently to distinguish them by individual categories.  The problem is the border colors overlap for adjacent counties.   I thought if I could scale the individual polygons down to 95% of their original size, the boundaries of adjacent counties would appear side by side without the overlap.

I created my own function to do this but concave polygons don't scale 100% correctly and still overlap each other a little so I am hoping there may be a pre-defined function that would scale the county polygons correctly.

Thank you,
Mike Rizzo


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