Creating 'blank' grids in grads

[Sestak, Michael L CIV 63134]

How about doing it "with" a data file.  Open any existing grid for the same area, define a new grid using const to set the values, then fwrite the result to a new file.

Michael Sestak
Fleet Numerical Meteorology and Oceanography Center
Monterey, CA



From: P.R.
Sent: Tue 6/23/2009 16:03
To: GRADSUSR at LIST.CINECA.IT
Subject: Creating 'blank' grids in grads


Id like to know if its possible to create a blank, zero-valued grid without
a data-file, and then manually create a field of variables, and then fwrite
everything to a binary file.

Example:
I want to create my own 10meter (u,v) winds for a specific region, in order
to create a custom wind field for a simulation. I want the entire grid to
have 40 knt winds coming from 45 degrees, so I would need to derive my u & v
values for such a wind, and then fill the entire grid with these
values...Then, I would want to fwrite the entire grid to a fortran binary
file.

Is this possible and/or practical?
If so, then how would I go about creating this 'blank' grid without a data
file?
And, how could I go about manually defining my 'u' and 'v' variables for the
entire grid?

Or, is there an easier/more practical way to create such a grid with
arbitrary, user-defined data fields (such as for use in simulations)?

Please help,
Thanks,
P.Romero
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