how to locate a point on land and ocean

[Pankaj Kumar]

Dear users,
I have ascii data file of more than 1000 points containing lat lon.
I want to know which point is on land and and which is
on ocean with the help of GrADS.
How I can do it?
with Thanks
P. Kumar

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Pankaj Kumar
Doctoral Fellow
Indian Institute of Tropical Meteorology
Homi Bhabha Road, NCL Post
Pune-411008, Maharashtra
India.
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