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Re: [netcdf-java] NcML aggregation across both variables and time dimension

Hi Jon:

You need one NcML file with nested netcdf elements. The problem is that you 
cant do a scan on these, you have to list them explicitly, eg:

<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>

 <aggregation dimName="time" type="joinExisting">

 <netcdf>
  <aggregation type="union">
<netcdf location="file:C:/test/path/temperature_20080101.nc" /> <netcdf location="file:C:/test/path/salinity_20080101.nc" /> </aggregation> </netcdf> 

 <netcdf>
  <aggregation type="union">
<netcdf location="file:C:/test/path/temperature_20080102.nc" /> <netcdf location="file:C:/test/path/salinity_20080102.nc" /> 
  </aggregation>
</netcdf> </aggregation> 
</netcdf>


Jon Blower wrote:

Hi all,

I have an ocean modelling dataset in which different variables are
stored in different files.  Also, there is one data file per timestep
for each variable.  So my filesystem looks like this:

temperature_20080101.nc
salinity_20080101.nc
temperature_20080102.nc
salinity_20080102.nc

I would like to construct an NcML file that aggregates all these files
into a single dataset but am having trouble.  Can I "union" the
variables together and then do a "joinExisting" on the union to
aggregate on the time dimension?  Do I need more than one NcML file
perhaps, with one file referencing the other?

Thanks, Jon
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