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

• To: netcdf-java@xxxxxxxxxxxxxxxx, support@xxxxxxxxxxx
• Subject: [netcdf-java] Error reading JGOFS data via OPenDAP using NetCDF-Java
• From: Brian Schlining <bschlining@xxxxxxxxx>
• Date: Tue, 24 Nov 2009 14:16:21 -0800

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

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

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