[gradsusr] xdfopen netcdf

[Jennifer Adams]

You have written a full descriptor file, so use 'open' instead of 'xdfopen'. --Jennifer

On May 31, 2013, at 7:05 AM, Qian, JianHua wrote:

> Hui and Grads Users, thanks!    
> But after I added "options template", I still got the same error message:
> 
> ga-> xdfopen uwnd_3d_day_79_08.ctl
> Scanning Descriptor File:  uwnd_3d_day_79_08.ctl
> gadxdf error: Missing or invalid dimension size.
>   --> The invalid description file record is: 
>   --> xdef  144 linear 0.0 2.5
>   The data file was not opened.
> 
> Now my ctl file is as follows:
> 
> dset ^uwnd.%y4.nc
> dtype netcdf
> title 3-D NCEP-DOE uwnd 1jan1979 to 31dec2008
> options template
> undef  -1.e+34
> xdef  144 linear 0.0 2.5
> ydef   73 linear 90.0 -2.5
> zdef 17 levels 1000 925 850 700 600 500 400 300 250 200 150 100 70 50 30 20 10
> tdef  10958 linear 00z01jan1979  24hr
> vars 1
> uwnd      17   t,z,y,x    m/s
> Endvars
> 
> I do not know what is wrong with my grads descriptor file.
> 
> Thanks!
> Joshua
> 
> From: Hui Wang - NOAA Affiliate <hui.wang at noaa.gov>
> Reply-To: GrADS Users Forum <gradsusr at gradsusr.org>
> Date: Thu, 30 May 2013 23:44:24 -0400
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Subject: Re: [gradsusr] xdfopen netcdf
> 
> Hi Joshua,
> 
> I think you need to add "options template" in the ctl file.
> 
> Good luck,
> Hui
> 
> 
> 
> 
> On Thu, May 30, 2013 at 10:32 PM, Qian, JianHua <JianHua_Qian at uml.edu> wrote:
> Grads Users,
> 
> I got the following message when doing
> xdfopen uwnd_3d_day_79_08.ctl
> 
> ga-> xdfopen uwnd_3d_day_79_08.ctl
> Scanning Descriptor File:  uwnd_3d_day_79_08.ctl
> gadxdf error: Missing or invalid dimension size.
>   --> The invalid description file record is: 
>   --> xdef  144 linear 0.0 2.5
>   The data file was not opened.
> 
> The descriptor file uwnd_3d_day_79_08.ctl   is copied below:
> 
> dset ^uwnd.%y4.nc
> dtype netcdf
> title 3-D NCEP-DOE uwnd 1jan1979 to 31dec2008
> undef  -1.e+34
> xdef  144 linear 0.0 2.5
> ydef   73 linear 90.0 -2.5
> zdef 17 levels 1000 925 850 700 600 500 400 300 250 200 150 100 70 50 30 20 10
> tdef  10958 linear 00z01jan1979  24hr
> vars 1
> uwnd      17   t,z,y,x    m/s
> Endvars
> 
> The data files are in the current directory:
> uwnd.1979.nc
> uwnd.1980.nc
> …
> When I do ncdump uwnd.1979.nc , I got:
> netcdf uwnd.1979 {
> dimensions:
> lon = 144 ;
> lat = 73 ;
> level = 17 ;
> time = UNLIMITED ; // (365 currently)
> nbnds = 2 ;
> variables:
> float level(level) ;
> level:units = "millibar" ;
> level:actual_range = 1000.f, 10.f ;
> level:long_name = "Level" ;
> level:positive = "down" ;
> level:GRIB_id = 100s ;
> level:GRIB_name = "hPa" ;
> level:axis = "z" ;
> level:coordinate_defines = "point" ;
> float lat(lat) ;
> lat:units = "degrees_north" ;
> lat:actual_range = 90.f, -90.f ;
> lat:long_name = "Latitude" ;
> lat:standard_name = "latitude_north" ;
> lat:axis = "y" ;
> lat:coordinate_defines = "point" ;
> float lon(lon) ;
> lon:units = "degrees_east" ;
> lon:long_name = "Longitude" ;
> lon:actual_range = 0.f, 357.5f ;
> lon:standard_name = "longitude_east" ;
> lon:axis = "x" ;
> lon:coordinate_defines = "point" ;
> double time(time) ;
> time:units = "hours since 1800-1-1 00:00:0.0" ;
> time:long_name = "Time" ;
> time:actual_range = 1569072., 1577808. ;
> time:delta_t = "0000-00-01 00:00:00" ;
> time:standard_name = "time" ;
> time:axis = "t" ;
> time:coordinate_defines = "start" ;
> time:avg_period = "0000-00-01 00:00:00" ;
> …
> Could someone give me a clue?  
> 
> Thanks!
> Joshua
> 
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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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