Andrew,<div>When writing a control file for a netCDF file, you need to specify the dimensions using t,z,x,y in the VARS listing for each variable. See this link (<a href="http://www.iges.org/grads/gadoc/descriptorfile.html#VARS">http://www.iges.org/grads/gadoc/descriptorfile.html#VARS</a>), specifically the section that talks about units for DTYPE netcdf (which you also need to include in your control file). It also looks like you need a TDEF and ZDEF line. The VARS entry should probably then look like</div>
<div><pre style="word-wrap:break-word;white-space:pre-wrap">h18_hc=>OHC 1 t,z,y,x
</pre><pre style="word-wrap:break-word;white-space:pre-wrap"><font face="arial, helvetica, sans-serif">since that is the order of the dimensions as given from the ncdump.</font></pre><div>Jeff Duda</div><br><div class="gmail_quote">
On Wed, Jul 17, 2013 at 5:50 AM, Andrew Friedman <span dir="ltr"><<a href="mailto:andfried@berkeley.edu" target="_blank">andfried@berkeley.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi everyone,<br>
<br>
I found one way to solve the problem using NCO: I extracted the relevant<br>
variable, and then removed the depth dimension as follows:<br>
<br>
ncks -O -v lat,lon,time,h18_hc NODC_heat_content_anomaly_0-700_yearly.nc<br>
NODC_yearly_h18_hc.nc<br>
ncwa -a depth NODC_yearly_h18_hc.nc NODC_yearly_h18_hc.nc<br>
<br>
Best,<br>
Andrew<br>
<div><div class="h5"><br>
<br>
Andrew Friedman wrote:<br>
> Hi GrADS users,<br>
><br>
> I'm having trouble opening a particular variable of a netcdf file.<br>
><br>
> I'm trying to examine NODC gridded ocean heat content, downloaded from<br>
> <a href="http://data.nodc.noaa.gov/woa/DATA_ANALYSIS/3M_HEAT_CONTENT/NETCDF/heat_content/heat_content_anomaly_0-700_yearly.nc" target="_blank">http://data.nodc.noaa.gov/woa/DATA_ANALYSIS/3M_HEAT_CONTENT/NETCDF/heat_content/heat_content_anomaly_0-700_yearly.nc</a><br>
><br>
><br>
> I'm attaching the output of ncdump -h to this message.<br>
><br>
> I am interested in the gridded variable h18_hc, but GrADS doesn't load<br>
> it when I open the file using sdfopen. I tried writing the attached<br>
> control file to open the particular variable h18_hc, but this yielded<br>
> the following error:<br>
><br>
> Scanning Descriptor File: OHC.ctl<br>
> gadxdf error: Missing or invalid dimension size.<br>
> --> The invalid description file record is:<br>
> --> xdef 360 linear -179.5 1<br>
> The data file was not opened.<br>
><br>
> Do you have any suggestions to either modify the netcdf or control file?<br>
><br>
> Thanks,<br>
> Andrew<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br>
</div>