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Re: grib to netcdf

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  • Subject: Re: grib to netcdf
  • Date: Tue, 18 May 2004 19:36:57 -0600 (MDT)
On Tue, 18 May 2004, Thomas Reichler wrote:

> Hi Robb,
>
> I asked Lori Thompson from here at GFDL the question below, and she
> thought you might be able to help me with this.
>
> The problem is that I have ECMWF data (era-40) which is want to
> transform to nc-data. Is there any quick fix for this problem, or is it
> possible to simply rename the variable names in the grib file?
>
> Thanks
> Thomas
>
>
> -------- Original Message --------
> Subject: grib to netcdf
> Date: Sun, 16 May 2004 16:51:54 -0400
> From: Thomas Reichler <address@hidden>
> To: Lori Thompson <address@hidden>
> CC: Thomas Reichler <address@hidden>
> References: <Pine.LNX.4.44.0402171358240.15096-100000@lat>
>
> Lori,
>
> I am having problems to convert grib to netcdf using the usual
> gribtocdl/gribtonc technique. The reason is that my grib file contains
> variable names which begin with a number (eg. 10U), which is being

Thomas,

That's a tough one. The specification of netCDF says variable names cannot
start with a digit but it can have [a-zA-Z0-9_] characters. The best
answer would be to go to the data source and ask if they have decoder to
ascii format, etc.  Then the variable names would have to be changed.
In the Unidata decoders package there's a program
ascii2nc that probably could be configured to produce a netcdf file. But,
it's going to be a lot of work. Maybe the data provide could change the
names also, it's almost standard that variable names don't start with a
digit. I'll ask around at work if anyone has an idea.

Robb...

> rejected by ncgen as an error. Do you have any idea how I could change
> variable names in a grib file, or is there any other method for the
> conversion?
>
> Thomas
>

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