[Met_help] More MET questions

[Daniel Schaffer]

Good deal!!

Dan

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Dan Schaffer, Research Associate            e-mail: Daniel.S.Schaffer at noaa.gov
NOAA/OAR/Earth System Research Lab         phone:  (303) 497-7252
Aviation Branch                             fax:    (303) 497-6301
R/GSD5   325 Broadway                       
Boulder, CO 80305

www-ad.fsl.noaa.gov/ac/schaffer.html

On Thu, 23 Oct 2008, John Halley Gotway wrote:

> Dan,
> 
> Wow, that does take a long time to parse that NEVS polyline mask with 3698 points in it.  I've added a task to our list for METv2.0 to support pre-computed masking regions in NetCDF format.  And we'll
> plan to include a tool to create that mask file from a polyline file and a forecast file (from which we'll extract the grid info).  Thanks for pointing this issue out.  I think it's a really good idea.
> 
> Then I ran Grid-Stat over the whole domain and found that we're using 1,679,940 matched pairs.  And I'm seeing the exact same GSL error message you're seeing.  When I run over a smaller domain
> (consisting of 391,294 points), it runs fine.  So I'm sure it has something to do with handling that large of a number of matched pairs.  I'll try to figure it out.
> 
> Thanks,
> John
> 
> 
> Daniel Schaffer wrote:
> > Hey John
> > 
> > FYI.  Given the difficulties I ran into as we have been discussing and a short time fuse I face, I have gone ahead and written my own code that computes counts for various neighborhood widths.  So at this moment it is not super-critical to resolve these issues.  However, it would be interesting to compare the counts I generate with MET's answers.
> > 
> > I've attached the files that you requested.  Note that I only attached a sample forecast file since the behavior is the same if the forecast and obs files are identical.
> > 
> > As for your response below; I had already seen that.  I'm not clear how it's relevant to the problem I'm having with the GSL gamma function.
> > 
> >>> Regarding GSL, please see the entry about GSL on the known issue page of the MET website:
> >>> http://www.dtcenter.org/met/users/support/known_issues/METv1.1/index.php
> >>> Look in the section on Grid-Stat.
> >>>
> > 
> > Thanks for your continued support.
> > Dan
> > 
> > 
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