[R-sig-Geo] Using ggplot2 to plot a shapefile

[Robert J. Hijmans]

Zev,

Here is an example:
http://blog.revolution-computing.com/2009/11/choropleth-challenge-result.html

Robert

On Tue, Mar 2, 2010 at 9:07 AM, Zev Ross <zev at zevross.com> wrote:
> Hi All,
>
> I'm using the ggplot2 library to make some plots and I'm wondering how I
> could plot a shapefile along with my points
>
> # I use this to plot my points
> p<-ggplot(elev,aes(X, Y))+geom_point(aes(color=Elev, size=Elev))
>
> # here I read in the county shapefile
> counties<-readShapePoly("X:/counties_teale.shp")
>
> # how do I add this to my plot would I use geom_polygon somehow?
>
> Thank you, Zev
>
> --
> Zev Ross
> ZevRoss Spatial Analysis
> 120 N Aurora, Suite 3A
> Ithaca, NY 14850
> 607-277-0004 (phone)
> 866-877-3690 (fax, toll-free)
> zev at zevross.com
>
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