Inerpolating to fill in missing values from NOAA data

[Chris Leather]

Hi,



My first post, unfortunately I don't think I'll be helping too much as I'm
pretty new to this - so just questions for now!



I'm trying to create charts from NOAA data and have almost cracked it BUT as
you can see from the attached graphic, I'm ending up with a jagged 'shadow'
around the coasts where the data stops.



I figure what I need to do is somehow extrapolate the data using something
like nearest neighbour algorithm.

So far I haven't worked out how to do this.



Maybe this is something that GRADS doesn't do and I need to look at the
degrib process.



Anyway, if anyone can help it would be great.



Many thanks,

Chris

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