Re: [idvusers] [Q] No gridded data found for ...

• To: Jiwon Seo <jwseo@xxxxxxxxxxxxxxx>
• Subject: Re: [idvusers] [Q] No gridded data found for ...
• From: "Lynnes, Christopher S. (GSFC-6102)" <christopher.s.lynnes@xxxxxxxx>
• Date: Mon, 25 Apr 2011 16:52:30 -0500

I'm only intermediate NetCDF/IDV user :-), but...I would look hard at the 
vertical coordinate (altitude).  The CF doc says:  
"A vertical coordinate will be identifiable by:
        • units of pressure; or
        • the presence of the *positive* attribute with a value of up or down 
(case insensitive)."

See: 
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.5/cf-conventions.html#vertical-coordinate
 for more details on the "positive" attribute.  I think if you specify that, 
IDV may be able to pick it up. (I also noticed that the Panoply tool can 
generate a display, but does not recognize the vertical dimension either.)

On Apr 25, 2011, at 5:23 PM, Jiwon Seo wrote:

> I'm a beginner of NetCDF and IDV.
> 
> I just created a simple NetCDF file, but when I tried to read this file into
> IDV, I got an error message "No gridded data found for ..."
> This simple NetCDF file passes a CF compliance checker.
> 
> Here is the complete .nc file (117KB).
> http://www.stanford.edu/~jwseo/public/myfirstcdffile.nc
> Please check this .nc file and give me some feedback.


> 
> 
> netcdf myfirstcdffile {
> dimensions:
>        longitude = 37 ;
>        latitude = 19 ;
>        altitude = 6 ;
>        time = 7 ;
> variables:
>        int longitude(longitude) ;
>                longitude:standard_name = "longitude" ;
>                longitude:units = "degrees_east" ;
>        int latitude(latitude) ;
>                latitude:standard_name = "latitude" ;
>                latitude:units = "degrees_north" ;
>        int altitude(altitude) ;
>                altitude:standard_name = "altitude" ;
>                altitude:units = "m" ;
>        float time(time) ;
>                time:standard_name = "time" ;
>                time:units = "days since 1900-01-01 0:0:0" ;
>                time:calendar = "standard" ;
>        float ne(time, altitude, latitude, longitude) ;
>                ne:standard_name = "air_density" ;
>                ne:units = "kg m-3" ;
>                ne:_FillValue = -9999.99f ;
> 
> // global attributes:
>                :title = "My first netcdf file" ;
>                :Conventions = "CF-1.4" ;
>                :Conventions_help = "
> http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.html";
> ;
>                :CreationDate = "2011/04/22 18:23:13" ;
> }
> 
> 
> Thank you!
> Jiwon
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Christopher Lynnes     
Goddard Earth Sciences Data and Information Center, NASA/GSFC
301-614-5185

• References:
  • [idvusers] [Q] No gridded data found for ...
    • From: Jiwon Seo