Using political country boundaries / areas to mask a grid

Hello

I'm trying to use the earth3.0 / ezmap dataset to mask a specific country on
a regular grid
This is relatively easy to do for a plot (graphic object) using the
appropriate map ressources to fill / mask a specific country
How can i use this dataset to check if a specific grid point X(ilat,ilon) is
included in a specific country and so attribute the country name
to this specific coordinates
then i could sort the values like ilat ilon Val Country_name
or mask a specific area consistent with the political boundaries (then i can
compute an index or whatever for this specific country)

Thanks for your help
Cheers
Cyril

-- 
Cyril Caminade
University of Liverpool, Department of Geography, Roxby Building, P.O. Box
147, Liverpool, L69 7ZT, UK
Tel: 00 44 (0)151 794 2567
http://sites.google.com/site/climatecam/Home

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Received on Thu Jun 18 2009 - 07:58:14 MDT