Re: Problems reading GRIB2 files

One thing I forgot to mention: the code for reading GRIB1 files is
built into the "ncl" executable and you don't need additional
files.

For GRIB2, however, the GRIB2 code tables are needed, and these are
installed in various directories under
$NCARG_ROOT/lib/ncarg/grib2_codetables.

--Mary

On Wed, 2 Sep 2009, Mary Haley wrote:

>
> [Gerry, thanks for taking a swing at this. What you suggested was my
> first thought too.]
>
> Samuel, I think you have just a partial version of NCL, since it is
> reporting version "5.1.1-alpha". You might have had an older version
> of NCL at one point, and I gave you a new alpha "ncl" to try but
> didn't give you all the extra files that go with it, like code tables.
>
> Since your "/data2/share/ncarg/lib/ncarg/grib2_codetables" doesn't
> exist, I recommend downloading and installing NCL V5.1.1 , so you can
> get the full, non-alpha version.
>
> The instructions are at:
>
> http://www.ncl.ucar.edu/Download/
>
> --Mary
>
>
> On Thu, 3 Sep 2009, Leung Samuel wrote:
>
>> Gerry,
>>
>> I have confirmed that /data2/share/ncarg/ is the $NCARG_ROOT. The permission
>> is 755.
>>
>> Despite the problem I face when handling grib2 files, the ncl I am using
>> works fine when I use it with grib1 files.
>>
>> Samuel
>>
>> On Wed, Sep 2, 2009 at 10:43 PM, Leung Samuel <shwl0608_at_gmail.com> wrote:
>>
>>> Gerry,
>>>
>>> Thanks for your quick reply.
>>>
>>> Sorry that I cannot access that computer until I am back to office tomorrow
>>> (I am from Hong Kong).
>>>
>>> As I remember, the path /data2/share/ncarg/lib/ncarg/ does exist but there
>>> is no "grib2_codetables" folder inside. What does that codetable folder
>>> essentially do?
>>>
>>> Samuel
>>>
>>>
>>> On Wed, Sep 2, 2009 at 10:20 PM, Gerry Creager <gerry.creager_at_tamu.edu>wrote:
>>>
>>>> Samuel,
>>>>
>>>> Sorry for the obvious questions, but, have you made sure
>>>> /data2/share/ncarg/lib really IS $NCARG_ROOT, or is it something more like,
>>>> /data2/share/ncl/lib/ncarg
>>>>
>>>> Also, what are the permissions on reading $NCARG_ROOT ?
>>>>
>>>> gerry
>>>>
>>>>
>>>> Leung Samuel wrote:
>>>>
>>>>> Hi NCL Team,
>>>>>
>>>>> This is the first time I use NCL to read GRIB2 files and I got problems
>>>>> when doing that. It seems that ncl is looking for a "codetable directory"
>>>>> and the following is the output of reading that GRIB2 file
>>>>>
>>>>> Copyright (C) 1995-2009 - All Rights Reserved
>>>>> University Corporation for Atmospheric Research
>>>>> NCAR Command Language Version 5.1.1-alpha
>>>>> The use of this software is governed by a License Agreement.
>>>>> See http://www.ncl.ucar.edu/ for more details.
>>>>> fatal: NclGRIB2: codetable directory
>>>>> "/data2/share/ncarg/lib/ncarg/grib2_codetables" invalid
>>>>> fatal:Could not open (myfile.grb2)
>>>>>
>>>>> (/data2/share/ncarg/ is the $NCARG_ROOT in my computer)
>>>>>
>>>>> And this error makes the ncl cannot continue. Does it mean I have to
>>>>> download a codetable from somewhere else before reading the GRIB2 file?
>>>>>
>>>>> Thanks and regards,
>>>>> Samuel Leung
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>>
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
>>>>> List instructions, subscriber options, unsubscribe:
>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>
>>>>
>>>> --
>>>> Gerry Creager -- gerry.creager_at_tamu.edu
>>>> Texas Mesonet -- AATLT, Texas A&M University
>>>> Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
>>>> Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
>>>>
>>>
>>>
>>
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Received on Wed Sep 02 2009 - 22:41:33 MDT