[R-sig-Geo] Contours and shape

[Roger Bivand]

On Wed, 23 Sep 2009, kapo coulibaly wrote:

> Is it possible to contour a grid and export the result as an ESRI shapefile?

Yes, see ContourLines2SLDF() in the maptools package. Then your choice of 
writeOGR() in rgdal or writeSpatialShape() in maptools.

> as a side question how do I search this mailing list?

Until recently, RSiteSearch() also searched the archives of this list. 
Regretably, the increasing volume of the main R lists, and the growth in 
the number of CRAN packages has led to this facility being withdrawn. An 
alternative is to use the Nabble search engine on this list (the full 
archive back to 2003 is present):

http://n2.nabble.com/R-sig-geo-f2731867.html

or Gmane:

http://dir.gmane.org/gmane.comp.lang.r.geo

which seems to go back to about 2005.

Hope this helps,

Roger

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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no