[R] making shape files into data bases usable within maps

From: claudia tebaldi <claudia.tebaldi_at_gmail.com>
Date: Mon, 10 Nov 2008 12:07:33 -0700


Hello R-helpers,

a while ago I had a question about identifying points on a map belonging to a specific region.
I learned at that time that if the region is part of one of the databases in the library maps that is easily done by using the function map.where() -- thanks to Duncan Murdoch for the hint!

My now related question is, what if my geographical information is not already available within maps (the library) but is in a shape file? I can read the file in R, but I'm not clear how to make it into a database that is "understood" by the functions in the library maps. Is this at all possible?

Thank you very much -- once again -- in advance

claudia

-- 
Claudia Tebaldi
Research Scientist, Climate Central
http://www.climatecentral.org
currently visiting IMAGe/NCAR
PO Box 3000
Boulder, CO 80305
tel. 303.497.2487

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