[R-sig-Geo] Scaling SpatialPolygons

[Robert J. Hijmans]

Mike, You can create a small inside (negative) buffer using rgeos and
use that. Robert

On Wed, Jul 17, 2013 at 9:17 AM, Rizzo, Michael <Rizzo.Michael at epa.gov> wrote:
> 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
>
>
>         [[alternative HTML version deleted]]
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo