[R-sig-Geo] locate a point

[Paul Hiemstra]

Shelob1985 at libero.it schreef:
>> Hi everybody. I have a very elementary question but any help is appreciated.
>> I have a database which contains the indication of latitude and 
>> longitude of, say, South American mineral ores. I have to find out in which 
>>     
> country 
>   
>> of South America each mineral ore is located. There are certainly maps of 
>>     
> South America with the indication of states boundaries which can be 
> read and drawn by R. Is there any way I can use R to assign each data point 
> to the country in which it falls? 
> Thanks, 
> Sheila
>
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>   
Hi,

Take a look at the overlay() command in the sp package. See also the 
rgdal package to read any boundary data into R.

cheers,
Paul

-- 
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone:  +3130 274 3113 Mon-Tue
Phone:  +3130 253 5773 Wed-Fri
http://intamap.geo.uu.nl/~paul