[R-sig-Geo] How to merge or overlay spatial objects

[Steve_Friedman at nps.gov]

Hi,

I'm working with a colleague who is attempting to overlay several
shapefiles and add attribute data to one of the shapefiles from an
independent *.csv file.

He has been successful in bringing in individual shapefiles into R, merging
the attribute data with one of the shapefiles, and plotting these one at a
time.

The ultimate objective is to plot them together and use the merged
attribute data to colorcode a specific subset of polygons associated with
the shapefile.

I apologize, for not having a good set of code snippets to share.  If
anyone can provide clues or guidelines on a method I would certainly
appreciate the assistance.

Thanks in Advance
Steve


Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034

Steve_Friedman at nps.gov
Office (305) 224 - 4282
Fax     (305) 224 - 4147