Hi Netcdf-Java Folks,
I have a problem accessing the CMIP3 database at
esg.llnl.gov<http://esg.llnl.gov> with netcdf-java. eg:
(from within matlab)
url =
'http://esg.llnl.gov/cgi-bin/dap-cgi.py/ipcc4/20c3m/cccma_cgcm3_1/pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da.xml';
obj = ucar.nc2.dataset.NetcdfDataset.openDataset(url);
??? Java exception occurred:
java.io.IOException: Error on line 1 of document
http://esg.llnl.gov/cgi-bin/dap-cgi.py/ipcc4/20c3m/cccma_cgcm3_1/pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da.xml:
XML
document structures must start and end within the same entity.
at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:233)
at ucar.nc2.ncml.NcMLReader.readNcML(NcMLReader.java:202)
at ucar.nc2.dataset.NetcdfDataset.acquireNcml(NetcdfDataset.java:819)
at ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:677)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:424)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:407)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:392)
at ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:379)
The same error occurs with ToolsUI launched with WebStart, so I think it is a
problem with netcdf-java, not matlab. I am using netcdf-4.2.26.jar and friends.
I can access the server using python/cdms2:
>> import cdms2 as cdms
>> url =
>> 'http://esg.llnl.gov/cgi-bin/dap-cgi.py/ipcc4/20c3m/cccma_cgcm3_1/pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da.xml'
>> f = cdms.open(url)
>> v = f.getVariables()
>> v
[<Variable: va, file: pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da, shape:
(14600, 9, 48, 96)>,
<Variable: tas, file: pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da, shape:
(14600, 48, 96)>,
<Variable: uas, file: pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da, shape:
(14600, 48, 96)>,
<Variable: hfss, file: pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da, shape:
(14600, 48, 96)>,
<Variable: lon_bnds, file: pcmdi.ipcc4.cccma_cgcm3_1.20c3m.run1.atm.da, shape:
(96, 2)>,
...
Similarly, I can access other opendap servers (eg.
http://ensemblesrt3.dmi.dk/cgi-bin/nph-dods/data/) using netcdf-java (via
matlab or ToolsUI).
So it appears to me to be some problem specific to the combination
netcdf-java/esg.llnl.gov.
Any suggestions? Any help appreciated.
dave r.
--
David Rayner
Department of Earth Sciences
University of Gothenburg
Office +46 (0)31 786 4849
Mobile +46 (0)738 542 404
david.rayner@xxxxxxxxx<mailto:david.rayner@xxxxxxxxx>
