[gradsusr] cannot load CO-OPS Great Lake NetCDF datasets

[James T. Potemra]

Hi Herb,

You'll need to generate a data descriptor file for this.  Note that this 
model output
is on a rectilinear grid (lat/lon) and sigma-coordinate (vertical), so 
even with a
descriptor file you will need to make some approximations.  On the plus 
side you
should be able to use the template option to get time-series if needed.

Jim

Let me know if you need more details.
On 9/16/14 9:27 AM, Philbrick, Herb wrote:
>
> Hello,
>
> I would like to access CO-OPS Great Lakes Operational Forecast System, 
> GLOFS, datasets using GrADS.
>
> I have never worked with netcdf files.
>
> Nor have I worked with a THREDDS server.
>
> I often access NOMADS through its OpenDAP server using GrADS on my 
> PC.  The GrADS command is like
>
> Sdfopen http://nomads.ncep.noaa.gov:9090/dods/rap/rap20140915/rap_00z
>
> I have tried the following in GrADS (grads.exe -- opendap enabled (see 
> the PS))
>
>         Sdfopen 
> http://opendap.co-ops.nos.noaa.gov/thredds/wms/NOAA/LMOFS/MODELS/201409/glofs.lmofs.fields.nowcast.20140915.t19z.nc
>
> GrADS returns the following message in the GrADS console:
>
> Scanning self-describing file: 
> http://opendap.co-ops.nos.noaa.gov/thredds/dodsC
>
> /NOAA/LMOFS/MODELS/201409/glofs.lmofs.fields.nowcast.20140915.t20z.nc
>
> nc_open failure:
>
> No such file or directory
>
> http://opendap.co-ops.nos.noaa.gov/thredds/dodsC/NOAA/LMOFS/MODELS/201409/glofs.lmofs.fields.nowcast.20140915.t19z.nc 
> does not exist or is not a netCDF file.
>
> Couldn't ingest SDF metadata.
>
> If this was an HDF-SDS file, try gradshdf.
>
> I downloaded the nc file to my PC c:\grads19\win32\ sub-directory.
>
> ga-> sdfopen glofs.lmofs.fields.nowcast.20140915.t19z.nc
>
> Scanning self-describing file: glofs.lmofs.fields.nowcast.20140915.t19z.nc
>
> SDF file has no discernable X coordinate.
>
> ga->
>
> ncdump on the _downloaded_ file DID obtain sensible information for 
> header, variables values, etc.
>
> The _downloaded_ file can be loaded into Excel using the NetCDF add-in.
>
>                 Hence, the downloaded file sure seems to be good.
>
> The folks at CO-OPS do not use GrADS and could not furnish advice.
>
> Can you give me the proper command or settings to use to access LMOFS 
> datasets?
>
> Thanks in advance,
>
> Herb Philbrick
>
> PS
>
> I am using Grads19 because, ultimately, I output grib-1 files.
>
> ga-> q config
>
> Config: v1.9.0-rc1 32-bit little-endian readline sdf/xdf netcdf dap 
> dap-stn lats
>
> athena printim
>
> Grid Analysis and Display System (GrADS) Version 1.9.0-rc1
>
> Copyright (c) 1988-2005 by Brian Doty and IGES
>
> Center for Ocean-Land-Atmosphere Studies (COLA)
>
> Institute for Global Environment and Society (IGES)
>
> This program is distributed WITHOUT ANY WARRANTY
>
> See file COPYRIGHT for more information.
>
> Built Fri Jan 25 02:30:31 EST 2008 for i686-pc-cygwin
>
> This version of GrADS has been configured with the following options:
>
> o This is a 32-bit LITTLE ENDIAN machine version.
>
> o Command line editing (readline) ENABLED.
>
> o CIRES/CDC (http://www.cdc.noaa.gov) SDF/XDF interface ENABLED.
>
> Use sdfopen/xdfopen to read NetCDF files.
>
> o DTYPE netcdf is ENABLED; DTYPE hdfsds is DISABLED.
>
> o OPeNDAP (a.k.a. DODS) gridded data interface ENABLED. 
> (http://opendap.org)
>
> This version is configured to access gridded data on OPeNDAP servers
>
> via the sdfopen or xdfopen commands, or using DTYPE netcdf.
>
> o OPeNDAP (a.k.a. DODS) station data interface (gadap) ENABLED.
>
> This version is configured to access station data on OPeNDAP servers
>
> via the open command.
>
> o PCMDI (http://www-pcmdi.llnl.gov) LATS interface ENABLED.
>
> This version is configured to write GRIB and NetCDF files.
>
> o DAO (http://dao.gsfc.nasa.gov) Athena Widget GUI ENABLED.
>
> o NRL/DAO/PCMDI XA or ImageMagick Image Output DISABLED.
>
> o printim command for direct png/gif output ENABLED.
>
> (via the GD Library -- http://www.boutell.com/gd)
>
> For additional information please consult http://grads.iges.org/grads/
>
> ga->
>
>
>
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