[Met_help] Question about MET grids

[John Halley Gotway]

Dan,

In Point-Stat and Grid-Stat, we do require that users indicate the region(s) over which they'd like to accumulate statistics.  It may be useful to look at smaller sub-domains to see how you're model
is performing in them.  However, you're right - it's often the case that users will simply want to accumulate statistics over the entire native grid.

In METv1.0, there was a clunky way of doing this by defining a polyline that fully contains your domain.  Since all of the points in your domain fall within that large polyline, they'd all be included.

In METv1.1, we implemented a more direct way of doing this by specifying the work "FULL" in the mask grids section.  "FULL" just means use the full grid.  This is noted in the comments in the
Grid-Stat configuration file for v1.1:
//
// Specify a comma-separated list of grids to be used in masking the data over
// which to perform scoring.  An empty list indicates that no masking grid
// should be performed.  The standard NCEP grids are named "GNNN" where NNN
// indicates the three digit grid number.  Enter "FULL" to score over the
// entire domain.
// http://www.nco.ncep.noaa.gov/pmb/docs/on388/tableb.html
//
// e.g. mask_grids[] = [ "FULL" ];
//

And it should also be in the user's guide.

Let me know if anything else comes up.

John

Daniel Schaffer wrote:
> grid_stat seems to require that we specify a grid upon which the data reside.  Unfortunately, our particular grid is not one of the NCEP available grids.  I have already figured out how to add my own grid and it's fairly trivial.  Still, I wonder if I really need to go through that hoop.  And, of course, every time I take a new version of MET, I have to make that code change again.  For our case, it really doesn't matter what grid the forecast and obs are on, so long as it's the same, since we are just computing counts.  Am I right that we must specify a grid?  If so, why?
> 
> Thanks,
> Dan
> 
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> Dan Schaffer, Research Associate            e-mail: Daniel.S.Schaffer at noaa.gov
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