Re: [netcdf-java] [Support] Error reading JGOFS data via OPenDAP using NetCDF-Java

• To: Brian Schlining <bschlining@xxxxxxxxx>
• Subject: Re: [netcdf-java] [Support] Error reading JGOFS data via OPenDAP using NetCDF-Java
• From: James Gallagher <jgallagher@xxxxxxxxxxx>
• Date: Tue, 1 Dec 2009 22:32:40 -0700

On Nov 24, 2009, at 3:16 PM, Brian Schlining wrote:

Hi All,

I'm trying to access JGOFS bottle data using NetCDF-Java. The JGOFS data is being served via OPeNDAP at the URL: http://usjgofs.whoi.edu/dods-bin/nph-dods/jgofs/merged_objects/US_JGOFS/Equatorial_Pacific/bottle_eqpac . The DDL can be viewed at http://usjgofs.whoi.edu/dods-bin/nph-dods/jgofs/merged_objects/US_JGOFS/Equatorial_Pacific/bottle_eqpac

James

Here's the issue:

---- I'm actually using the NetCDF-Java inside of Matlab (see http://code.google.com/p/nctoolbox/) . The versions of the Java jars are:

    netcdf-4.0
    opendap-2.1

---- Here's the steps I'm taking in Matlab. (It looks like Java pseudo-code) :

    url = 
'http://usjgofs.whoi.edu/dods-bin/nph-dods/jgofs/merged_objects/US_JGOFS/Equatorial_Pacific/bottle_eqpac'
    netcdf = ucar.nc2.dataset.NetcdfDataset.openDataset(url);
     vars = netcdf.getVariables();
     v = vars.get(0);
     foram = v.findVariable('foram');
     data = foram.read();

When I make the call to 'read()' the following Exception is thrown:

opendap.dap.DAP2Exception: "Could not open bottle_eqpac(Level_0): l_jdbopen, &x Bad Name: Level_0: "

        at opendap.dap.DConnect2.openConnection(DConnect2.java:233)
        at opendap.dap.DConnect2.getData(DConnect2.java:699)
        at opendap.dap.DConnect2.getData(DConnect2.java:979)

at ucar .nc2.dods.DODSNetcdfFile.readDataDDSfromServer(DODSNetcdfFile.java: 1125)

        at ucar.nc2.dods.DODSNetcdfFile.readData(DODSNetcdfFile.java:1289)
        at ucar.nc2.Variable._read(Variable.java:927)
        at ucar.nc2.Variable.read(Variable.java:791)
        at ucar.nc2.Variable._read(Variable.java:914)
        at ucar.nc2.Variable.read(Variable.java:791)
        at ucar.nc2.dataset.VariableDS._read(VariableDS.java:469)
        at ucar.nc2.Variable.read(Variable.java:791)
??? Java exception occurred:

java.io.IOException: "Could not open bottle_eqpac(Level_0): l_jdbopen, &x Bad Name:

Level_0: "
        at ucar.nc2.dods.DODSNetcdfFile.readData(DODSNetcdfFile.java:1296)
        at ucar.nc2.Variable._read(Variable.java:927)
        at ucar.nc2.Variable.read(Variable.java:791)
        at ucar.nc2.Variable._read(Variable.java:914)
        at ucar.nc2.Variable.read(Variable.java:791)
        at ucar.nc2.dataset.VariableDS._read(VariableDS.java:469)
        at ucar.nc2.Variable.read(Variable.java:791)


Note: This happens both inside of Matlab and in just plain Java.

Am I accessing the JGOFS data structure correctly? Any help is appreciated!!

Thanks

-- B ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Brian Schlining
bschlining@xxxxxxxxx
_______________________________________________
Support mailing list
Support@xxxxxxxxxxx
http://mailman.opendap.org/mailman/listinfo/support

--
James Gallagher
jgallagher at opendap.org
406.723.8663

• References:
  • [netcdf-java] Error reading JGOFS data via OPenDAP using NetCDF-Java
    • From: Brian Schlining