On Wed, Oct 15, 2008 at 6:06 PM, Thomas Lumley <[EMAIL PROTECTED]> wrote: > > > I am trying to draw a US map with color-coded cities superimposed on > color-coded states, showing survey results from the Behavioral Risk Factor > Surveillance System. You can see the sort of thing I'm trying to do at > http://apps.nccd.cdc.gov/gisbrfss/select_question.aspx (though I don't want > all the text). > > I have the spatial data, which are a shapefile of polygons for the states, > and a shapefile of points for the cities. I can read these in and use > spplot() and the sp.layout option to get the points plotted on top of the > polygons, but I can't figure out how to get a common set of colors used for > both and and a color key drawn.
It's relatively easy to do this with ggplot2 (the tricky part is converting the polygons to a data frame) - I can provide some code if you're interested. Hadley -- http://had.co.nz/ _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
