Hello Jiwon-
You need to add the "positive" attribute to the vertical dimension. See
this section of the CF Manual:
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.5/cf-conventions.html#vertical-coordinate
If you place the attached NcML file in the same location as the netcdf
file, you can open that in the IDV. It uses NcML to add in that attribute.
Good luck.
Don
On 4/25/11 3:23 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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--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/
<?xml version="1.0" encoding="UTF-8"?>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";
location="myfirstcdffile.nc">
<variable name="altitude" shape="altitude" type="int">
<attribute name="positive" value="up"/>
</variable>
</netcdf>
