Re: grib to netcdf conversion question

On Mon, 12 Feb 2007, John Kelley wrote:

> Mr. Ross,
>
> Are you dealing with GRIB or GRIB2 GFS files?
>
> Sincerely,
> John Kelley
> NOAA/National Ocean Service
>
>
> > Hello all,
> >
> >
> > I'm trying to convert model grib files into GFE/IFPS compatible file 
> > formats using the Unidata Converter suite.  So far I'm having no luck and 
> > am seeking input from anyone who may be able to help.
> >
> >
> > Here's what I've done so far...
> >
> >
> > 1.  I'm using a GFS grib file for input.
> >
> >
> > 2.  Create a .cdl file:
> >
> >         $ gribtocdl -v -g awips.tbl  2007021212_gfs.grib > 
> > gfs_2007021212.cdl
> >
> >
> >         * I'm using a awips.tbl file that I found while browsing the 
> > unidata archives
> >
> >
> > 3.  Create the nc file:
> >
> >         $ gribtonc -l - -g awips.tbl gfs_2007021212.cdl awips.nc < 
> > 2007021212_gfs.grib

Hi,

if the 2007021212_gfs.grib is in awips format then no Unidata decoder can 
convert it to netCDF directly because we don't suppport AWIPS.  Also the 
gribtonc decoder is being deprecated for the the Java Grib Libraries. To 
use the Java Grib libraries:


One needs to download the toolsUI.jar from the netCDF java page, 
http://www.unidata.ucar.edu/software/netcdf-java/

set the classpath and run Grib2Netcdf

#/bin/csh -f

set CP="<yourpathtoo>toolsUI-2.2.18.jar"

java -Xmx512m -classpath $CP ucar.nc2.iosp.grib.Grib2Netcdf INPUT OUTPUT.NC

Don't forget to add the INPUT grib file and OUTPUT.NC names.

robb...

ps  if the conversion didn't work, you can look at the data with the 
ToolUI program by:

java -Xmx512m -classpath $CP ucar.nc2.ui.ToolsUI

> >         My output here is interesting and may be problematic.  Here is a 
> > sample:
> >
> >
> >         -------------
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > Nx: 129 != 65
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > Ny: 85 != 65
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > La1: 7.838 != -20.826
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > Lo1: -141.028 != -150
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > Dx: 95250 != 381000
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD99 KWBC 121200, awips.nc nav. mismatch 
> > Dy: 95250 != 381000
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > Nx: 129 != 65
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > Ny: 85 != 65
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > La1: 7.838 != -20.826
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > Lo1: -141.028 != -150
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > Dx: 95250 != 381000
> >
> > Feb 12 21:37:59 gribtonc[13996]: YHHD30 KWBC 121200, awips.nc nav. mismatch 
> > Dy: 95250 != 381000
> >
> > Feb 12 21:37:59 gribtonc[13996]: YUHD85 KWBC 121200, awips.nc nav. mismatch 
> > Nx: 129 != 65
> >
> >
> > -------------
> >
> >
> > 4.  Even though I'm getting hundreds (thousands) of mismatch statements I 
> > do get a large .nc file.
> >
> >
> > From there I'm tried to put it into my designated input directory in the 
> > GFE/IFPS but do not see it available when I run the program.
> >
> >
> > Obviously I'm doing something wrong.
> >
> >
> > Can anyone out there help me?   Thanks in advance for any 
> > comments/suggestions, etc, I really appreciate it!
> >
> >
> > -Charles
> >
> >
> > -------------------
> >
> >
> > Charles Ross
> >
> > Meteorologist
> >
> > Bonneville Power Administration
> >
> > 905 NE 11th Ave.
> > Portland , OR 97232
> >
> >
> > 503-230-3159
> >
> >
> > address@hidden

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================