Re: [netcdf-java] grib read error

• To: skbhate@xxxxxxxxxxxxxxx
• Subject: Re: [netcdf-java] grib read error
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Wed, 06 May 2009 08:50:40 -0600

Hi Sachin-

We recently found this bug with another dataset and it has been
fixed.  It was a bug introduced in the grib reading library.
However, a new release of netCDF-Java with the
fix is pending the repair of John's machine. ;-)

Don

Sachin Kumar Bhate wrote:

John,

We are trying to read the coordinate variables from a grib file, but
somehow the variable array is being populated with the same 1st value.

1. Check screen grab lon values in latest toolsUI (Version 4.0.41.20090505.2215) at

   http://www.gri.msstate.edu/rsearch_data/nopp/lon_sachin.jpg

2. The other strange thing is that Rich is using the latest toolsUI as well on a machine that does not have latest JVM (i.e. 1.6) and on that machine the lon variables

   show up correctly... check his screen grab,
   http://www.gri.msstate.edu/rsearch_data/nopp/lon_rich.png

Looks like the attribute 'grid_spacing' in step 1 above is not set properly.

It says '0.0 degrees_east', while it should be '0.25 degrees_east'.

The file we are trying to read is at

ftp://polar.ncep.noaa.gov/pub/history/waves/wna.dp.200409.grb

The netcdf file for above grib file (converted using NCL) is at

http://omglnx4.meas.ncsu.edu/joseph/skb_help/wna.dp.200409.nc


Any comments,

thanks,

Sachin

--
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
*************************************************************

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  • [netcdf-java] grib read error
    • From: Sachin Kumar Bhate