[gradsusr] netcdf files with different order of variables
Semyon Grodsky
senya at umd.edu
Tue Feb 6 12:44:49 EST 2018
Jeff,
I am using CTL that templates all daily files. To open data
open CTL
--Senya
On 2/6/2018 12:30 PM, Jeff Duda wrote:
> Just curious how this goes. Are you using sdfopen to query the file?
> In my experience viewing netCDF data in Grads, you can write a control
> file to only view the specific arrays you want to display and omit the
> rest from the VARS section. I've done exactly this with WRF output for
> years. Have you tried this?
>
> Jeff Duda
>
> On Tue, Feb 6, 2018 at 7:21 AM, Jennifer M Adams <jadams21 at gmu.edu
> <mailto:jadams21 at gmu.edu>> wrote:
>
> Yes, it most definitely DOES matter!
>
> Grads requires that the netcdf varids be consistent for each
> variable in a templated set of data files. If the variables are
> written out in different order in some of the data files, the
> varids won’t be the same, and GrADS will get upset. I think using
> NCO to rearrange the variables is your best option, but be careful
> if the data are compressed/chunked — NCO will not retain existing
> chunking parameters in the output file, and the defaults are not
> GrADS-friendly. Use the —cnk_dmn option to specify which
> dimensions should be chunked and what the chunk size should be.
> —Jennifer
>
>
>
> > On Feb 6, 2018, at 3:33 AM, M.Mahakur <mmahakur at TROPMET.RES.IN
> <mailto:mmahakur at TROPMET.RES.IN>> wrote:
> >
> > It doesn't matter.
> >
> >
> >
> > ----- Original Message -----
> > From: Semyon Grodsky <senya at umd.edu <mailto:senya at umd.edu>>
> > To: GrADS Users Forum <gradsusr at gradsusr.org
> <mailto:gradsusr at gradsusr.org>>
> > Sent: Tue, 06 Feb 2018 09:43:43 +0530 (IST)
> > Subject: [gradsusr] netcdf files with different order of variables
> >
> > Dear GRADS community,
> >
> > I face a bit unusual problem. I have data in netcdf fromat, but a
> > portion of files has different order of variables. For an
> example, some
> > files has the following order of variables u,v,T.S while other
> files -
> > T,S, u,v.
> >
> > Is there a way to use all these data in GRADS?
> >
> > Alternatively, could smb suggest a simple (utility based) way to
> unify
> > the order of variables (say change T,S, u,v => u,v,T.S)?
> >
> > Thanks,
> >
> > --Senya
> >
> > --
> > -----------------------------------------------
> > Semyon Grodsky
> > University of Maryland
> > Department of Atmospheric and Oceanic Science
> > Room 2409, Atlantic Building (224)
> > 4254 Stadium Dr.
> > College Park, MD 20742
> >
> > Phone: 301-405-5330
> > Fax: 301-314-9482
> > E-mail: senya at atmos.umd.edu <mailto:senya at atmos.umd.edu>
> >
> > _______________________________________________
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> > gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
> >
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> >
>
> --
> Jennifer Miletta Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> George Mason University
>
>
>
>
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>
>
>
> --
> Jeff Duda, Research Scientist
>
> University of Colorado Boulder
>
> Cooperative Institute for Research in Environmental Sciences
>
> NOAA/OAR/ESRL/Global Systems Division
>
> Boulder, CO
>
>
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--
-----------------------------------------------
Semyon Grodsky
University of Maryland
Department of Atmospheric and Oceanic Science
Room 2409, Atlantic Building (224)
4254 Stadium Dr.
College Park, MD 20742
Phone: 301-405-5330
Fax: 301-314-9482
E-mail: senya at atmos.umd.edu
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