[gradsusr] help - NetCDF file

Thu Jul 11 13:33:38 EDT 2013

Hi Celso:

You also have to add the option "template":
OPTIONS template

Jim
On 7/11/13 6:57 AM, Celso Bandeira de Melo Ribeiro wrote:
> Hi James,
> Thank you for attention and help.
> I modified the file data to diaries as show below:
>
> DSET ^amazonia.clm2.h0.2002-01-%m2-00000.nc
> OPTIONS 365_day_calendar
> tdef time 4 linear 01jan2000 1dy
>
> But it did not work, appeared the following error message:
>
> ga-> xdfopen amazonia.ctl
> Scanning Descriptor File:  amazonia.ctl
> Error: nc_open failed to open file amazonia.clm2.h0.2002-01-%m2-00000.nc
> No such file or directory
> gadsdf: Couldn't ingest SDF metadata.
> SDF Descriptor file amazonia.ctl was not successfully opened & parsed.
> ga->
>
> All the best!
>
> Celso
>
>
>
> On Wed, 10 Jul 2013 17:06:21 -1000, "James T. Potemra" <jimp at hawaii.edu>
> wrote:
>> Celso:
>>
>> Your descriptor file lists four times (months), but it is specifically
>> reading only one file (amazonia.clm2.h0.2002-01-01-00000.nc).  You
>> likely want to read all four, so you'll have to add an option
>> "template".  Also, it's not clear from the file names if they reference
>> month-day or day-month, e.g., is amazonia.clm2.h0.2002-01-04-00000.nc
>> for January 4, 2002 or April 1, 2002?  In your descriptor file you
>> specify the time increment as monthly (1mo).  If the files have single
>> time values (one monthly value), and the format of the file name is
>> day-month, your DSET line should be something like:
>>
>> DSET ^amazonia.clm2.h0.2002-01-%m2-00000.nc
>>
>> The %m2 indicating a substitution template of 2-digit month.
>>
>> Jim
>>
>> On 7/10/13 3:58 PM, Celso Bandeira de Melo Ribeiro wrote:
>>> Hi Matt,
>>>
>>> Thank you very much for your attention and help.
>>> Worked perfectly I created the following file:
>>>
>>> DSET ^amazonia.clm2.h0.2002-01-01-00000.nc
>>> OPTIONS 365_day_calendar
>>> tdef time 4 linear 01jan2000 1mo
>>>
>>> I am working with 4 files (Daily), whose names are:
>>>
>>> amazonia.clm2.h0.2002-01-01-00000.nc
>>> amazonia.clm2.h0.2002-01-02-00000.nc
>>> amazonia.clm2.h0.2002-01-03-00000.nc
>>> amazonia.clm2.h0.2002-01-04-00000.nc
>>>
>>> The file opens perfectly in GrADS:
>>>
>>> ga-> xdfopen amazonia.ctl
>>> Scanning Descriptor File:  amazonia.ctl
>>> SDF file amazonia.clm2.h0.2002-01-01-00000.nc is open as file 1
>>> LON set to 279.062 311.875
>>> LAT set to -20.2999 6.45372
>>> LEV set to 0.00710064 0.00710064
>>> Time values set: 2000:1:1:0 2000:1:1:0
>>> E set to 1 1
>>> ga-> q file
>>> File 1 : CLM History file information
>>>     Descriptor: amazonia.ctl
>>>     Binary: amazonia.clm2.h0.2002-01-01-00000.nc
>>>     Type = Gridded
>>>     Xsize = 106  Ysize = 115  Zsize = 15  Tsize = 4  Esize = 1
>>>     Number of Variables = 175
>>>       ...
>>>        tsoi  15  t,z,y,x  soil temperature
>>>        tsoi_10cm  0  t,y,x  soil temperature in top 10cm of soil
>>>        tv  0  t,y,x  vegetation temperature
>>>        u10  0  t,y,x  10-m wind
>>>        urban_ac  0  t,y,x  urban air conditioning flux
>>>    ...
>>>
>>> But when I try to open in GrADS putting time as a variable (set 1 t 4)
>>> appears the following error message:
>>>
>>> ga-> set t 1 4
>>> Time values set: 2000:1:1:0 2000:4:1:0
>>> ga-> d tsoi
>>> Contouring: 273 to 279 interval 0.5
>>> gancgrid error: nc_get_vara_double failed; NetCDF: Index exceeds
>>> dimension
>>> bound
>>> Data Request Error:  Error for variable 'tsoi'
>>>     Error ocurred at column 1
>>> DISPLAY error:  Invalid expression
>>>     Expression = tsoi
>>> ga->
>>>
>>> You know how to help me change the time?
>>>
>>> All the best!
>>>
>>> Celso
>>>
>>>
>>>
>>> On Wed, 10 Jul 2013 12:43:38 -0700, Matt Masarik
>>> <mmasarik at atmos.ucla.edu>
>>> wrote:
>>>> Hi Celso,
>>>>
>>>> you can solve this by using a small (3 line) control file
>>>> that has the 365_day_calendar option specified.  Copy
>>>> the following text into a file, say, amazonia.ctl
>>>>
>>>> DSET ^amazonia.clm2.h0.2002-01-04-00000.nc
>>>> OPTIONS 365_day_calendar
>>>> tdef time 3084 linear 16jan1850 1mo
>>>>
>>>> I put your file name in the DSET line already.  You will
>>>> need to change the 3084 to the total number of time
>>>> records in the file.  You can find this out by issuing
>>>> the following at a command prompt:
>>>>
>>>> ncdump -c amazonia.clm2.h0.2002-01-04-00000.nc
>>>>
>>>> you will also need to change 16jan1850 to the start
>>>> date of your data set, again use ncdump.
>>>>
>>>> Once you make those changes you should be able to open
>>>> the file by using
>>>>
>>>> xdfopen amazonia.ctl
>>>>
>>>>
>>>> Matt
>>>>
>>>>
>>>> On 07/10/2013 11:50 AM, Celso Bandeira de Melo Ribeiro wrote:
>>>>> Hello,
>>>>> I'm working with GrADS Version 2.0.a9 in Linux Ubuntu 64-bit and I am
>>> not
>>>>> able to open NetCDF file.
>>>>> I am using the function "sdfopen" but an error message appears as
>>> sending
>>>>> the attachment.
>>>>> The message, as follows:
>>>>>
>>>>> ga-> sdfopen amazonia.clm2.h0.2002-01-04-00000.nc
>>>>> Scanning self-describing file:  amazonia.clm2.h0.2002-01-04-00000.nc
>>>>> SDF Error: 365 day calendars are no longer supported by sdfopen.
>>>>>      To open this file with GrADS, use a descriptor file with
>>>>>      a complete TDEF entry and OPTIONS 365_day_calendar.
>>>>>      Documentation is at
>>> http://iges.org/grads/gadoc/SDFdescriptorfile.html
>>>>> ga->
>>>>>
>>>>> I would like to know how solve this problem.
>>>>> Thank you!
>>>>> Celso
>>>>>
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