[R-sig-Geo] extracting outer boundary in spedep or GeoDa

[Alok K. Bohara, PhD]

Hi Cory

I saw this message and thought of asking you  a question.  Or anyone 
else..  I am new to R and I am trying to learn GeoRglm.  I have used 
spdep to read state shape file to extract centroids, neighbors etc...Is 
there anyway I can extract just the outer polygon  boundary as a n by 2 
text file from such a state shape file?  I tried using GeoDa to export 
such a file using a command Shape to  Boundary,  but it gives a file 
with boundaries for all the counties (I think).  All I want is the state 
outline polygon. 

Thanks.
Alok Bohara

"Have you tried just reading the shapefile directly into R using the  readShapePoly command in maptools.  spdep can form the neighbors and  weights matrices from the shapefile, then you don't have to bother  
with the export.  Corey"




-- 
Alok K. Bohara, Ph.D.
Professor
Department of Economics
University of New Mexico
Albuquerque, NM 87131,USA
Ph: 505-277-5903/5304(w)
Fax:505-277-9445
email: bohara at unm.edu
http://www.unm.edu/~econ/faculty/professors.html
Nepal Study Center: http://nepalstudycenter.unm.edu