[gradsusr] plot shaded color only within the boundary of my country

[Chinh ta huu]

Dir all users

I have a picture in attached file, so I 'd like to draw shaded color
only within boundary of my country (mean that not display color over
the boundary of my country).

Anyone please give me some advice
Thank you very much

Chinh

-- 
(Mr.) Ta Huu Chinh
National, Weather Forecasting Center, Ha Noi, Viet Nam.
No: 4th, Dang Thai Than, Hoan Kiem, Ha Noi
Tel: 84-903-298-856
Office: 84-43-824-4917
Email: chinhth2010 at gmail.com
Website: http://vn.myblog.yahoo.com/chinhth2005/
Website: http://bestknowledge-chinhth.blogspot.com/
Website: http://anhcuoidep.vn
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