[gradsusr] opening CAM netcdf files with grads
Jennifer Adams
jma at cola.iges.org
Tue Nov 6 12:39:34 EST 2012
Well, that looks right. Check for any hidden whitespace characters (like a tab) after the 144 in your XDEF entry. Or, perhaps you can do with a simpler version, 'XDEF lon'. With xdfopen, you only need entries for those coordinates that have missing or inadequate metadata. If it is CAM output, you might not need XDEF or YDEF at all…
--Jennifer
On Nov 6, 2012, at 11:32 AM, Cara-Lyn Lappen wrote:
> yes, I used xdfopen.. Here is the information you requested: Any advice would be much appreciated,
>
> Here is the complete grads session that occurred:
>
> -> grads
>
> Grid Analysis and Display System (GrADS) Version 2.0.a9
> Copyright (c) 1988-2010 by Brian Doty and the
> Institute for Global Environment and Society (IGES)
> GrADS comes with ABSOLUTELY NO WARRANTY
> See file COPYRIGHT for more information
>
> Config: v2.0.a9 little-endian readline printim grib2 netcdf hdf4-sds hdf5 opendap-grids geotiff shapefile
> Issue 'q config' command for more detailed configuration information
> Landscape mode? ('n' for portrait):
> GX Package Initialization: Size = 11 8.5
>
> ga-> xdfopen test.ctl
> Scanning Descriptor File: test.ctl
> gadxdf error: Missing or invalid dimension size.
> --> The invalid description file record is:
> --> xdef lon 144 linear 0.0 2.5
> The data file was not opened.
>
>
> Here is my test.ctl file:
>
> DSET ^tiltedheat_daily_1980_1997_FLNT_anom.nc
> TITLE This is only a test
> options template 365_day_calendar
> UNDEF -999
> XDEF lon 144 LINEAR 0.0 2.5
> YDEF lat 96 LINEAR -90. 1.9
> TDEF 6206 LINEAR 00Z1jan1980 1dy
> VARS 1
> OLR=>FLNT_anom 0 x,y OLR
> ENDVARS
>
>
>
>
>
> On Nov 2, 2012, at 4:42 AM, Jennifer Adams <jma at cola.iges.org> wrote:
>
>> Did you use xdfopen? Please send the complete text of your GrADS session, including the version number. You will need the 'options 365_day_calendar' entry to your descriptor. --Jennifer
>>
>>
>> On Nov 1, 2012, at 9:34 PM, Cara-Lyn Lappen wrote:
>>
>>> Removing lon and lat did not work
>>>
>>> I get the same error message.
>>>
>>> The other suggestion to add the line : "options template 365_day_calendar" also did not work.
>>>
>>> any other ideas? Im open…
>>>
>>> Cara-Lyn
>>>
>>>
>>>
>>> On Nov 1, 2012, at 7:25 PM, Rupak Rajbhandari <rupak.rajbhandari at gmail.com> wrote:
>>>
>>>> remove 'lon' & 'lat' from xdef and ydef line in a descriptor file.
>>>>
>>>> -rupak
>>>>
>>>>
>>>> On Fri, Nov 2, 2012 at 2:24 AM, Sagar Parajuli <psagar at utexas.edu> wrote:
>>>> Hi Cara-lyn
>>>> In your script please include the following and use xdfopen to open the
>>>> file, it should work:
>>>> options template 365_day_calendar
>>>>
>>>>
>>>>
>>>> ,
>>>>
>>>> Sagar Prasad Parajuli
>>>> Graduate Student/Research Assistant
>>>> University of Texas at Austin
>>>> Jackson School of Geosciences
>>>> 1 University Station C1100, JGB 5.322
>>>> Austin, TX 78712
>>>> Contact: psagar at utexas.edu
>>>> Cell: 512 965 4093
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org]
>>>> On Behalf Of Cara-Lyn Lappen
>>>> Sent: Thursday, November 01, 2012 3:10 PM
>>>> To: gradsusr at gradsusr.org
>>>> Subject: [gradsusr] opening CAM netcdf files with grads
>>>>
>>>> hi all,
>>>>
>>>> I am fairly new to GraDs. I am trying to use GraDs to open a netcdf file
>>>> created by the NCAR CAM model. I have tried everything and I can't get it to
>>>> work.
>>>> sdfopen doesn't work because it has a 365 day calendar. So, I tried xdfopen
>>>> with a model descriptor file that looks like this (test.ctl)
>>>>
>>>> DSET ^tiltedheat_daily_1980_1997_FLNT_anom.nc
>>>> TITLE This is only a test
>>>> UNDEF -999
>>>> XDEF lon 144 LINEAR 0.0 2.5
>>>> YDEF lat 96 LINEAR -90. 1.9
>>>> TDEF 6206 LINEAR 00Z1jan1980 1dy
>>>> VARS 1
>>>> OLR=>FLNT_anom 0 x,y OLR
>>>> ENDVARS
>>>>
>>>> -----------------------------------------------------------
>>>>
>>>> The ncdump -h output for this file looks like this:
>>>>
>>>> netcdf tiltedheat_daily_1980_1997_FLNT_anom {
>>>> dimensions:
>>>> time = UNLIMITED ; // (6206 currently)
>>>> lat = 38 ;
>>>> lon = 144 ;
>>>> variables:
>>>> double time(time) ;
>>>> time:long_name = "time" ;
>>>> time:units = "days since 1980-01-01 00:00:00" ;
>>>> time:calendar = "noleap" ;
>>>> time:bounds = "time_bnds" ;
>>>> double lat(lat) ;
>>>> lat:long_name = "latitude" ;
>>>> lat:units = "degrees_north" ;
>>>> double lon(lon) ;
>>>> lon:long_name = "longitude" ;
>>>> lon:units = "degrees_east" ;
>>>> float FLNT_anom(time, lat, lon) ;
>>>> FLNT_anom:_FillValue = -999.f ;
>>>> FLNT_anom:long_name = "OLR Anomalies from Raw Daily
>>>> Climatology" ;
>>>> FLNT_anom:units = "W/m2" ;
>>>> float FLNT_anom_sm(time, lat, lon) ;
>>>> FLNT_anom_sm:_FillValue = -999.f ;
>>>> FLNT_anom_sm:long_name = "FLNT Anomalies from Smooth Daily
>>>> Climatology" ;
>>>> FLNT_anom_sm:units = "W/m2" ;
>>>>
>>>> // global attributes:
>>>> :creation_date = "Wed Sep 5 13:44:55 CDT 2012" ;
>>>> :title = "FLNT: Daily Anomalies: 1980-1997" ; }
>>>>
>>>> ----------------------------------------------------
>>>>
>>>> The error I keep getting when I type "open test.ctl" is:
>>>>
>>>> Scanning description file: test.ctl
>>>> Open Error: Missing or invalid dimension size.
>>>> --> The invalid description file record is:
>>>> --> XDEF lon 144 LINEAR 0.0 2.5
>>>> The data file was not opened.
>>>>
>>>>
>>>> What is wrong with the xdef line? it seems so basic to implement, but it
>>>> won't work.
>>>>
>>>> any help that anyone has would be much appreciated,
>>>>
>>>> thanks,
>>>>
>>>> Cara-Lyn
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Cara-Lyn
>>>>
>>>>
>>>> ***************************************************
>>>> Dr. Cara-Lyn Lappen
>>>> Dept. of Atmos. Sciences ,__o
>>>> Texas A&M University _ -\ _<;
>>>> Phone: (970) 382-2290 (*) /' (*)
>>>> Cell Phone: (970) 946-6134
>>>> Email: lappen7 at gmail.com
>>>> ***************************************************
>>>>
>>>>
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>>
>> --
>> Jennifer M. Adams
>> IGES/COLA
>> 4041 Powder Mill Road, Suite 302
>> Calverton, MD 20705
>> jma at cola.iges.org
>>
>>
>>
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>
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org
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