Setting Mexico data to _FillValue

I have data that covers most of CONUS and part of the ocean, Canada, and
Mexico. I would like to set all the data that is not over the CONUS to
_FillValue. but I can't find an efficient way to do this. I know I can
set the ocean data to _FillValue with the mask function since I have the
land/sea mask, but I do not have a similar data set for political
boundaries. Any suggestions would be appreciated. Thanks!

-Eric

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Received on Thu May 28 2009 - 06:35:18 MDT