Hi Hermann:
It looks like a bug in the HDF5 file format. Im working on a work-around, ill
let you know when i have something. Thanks for reporting.
John
Hermann Schwarting wrote:
Hi,
I'm trying to use netcdf-java for reading HDF5 files with radar data.
As simple test program using NetcdfFile.open() was used. I have tried
the sample files found on [ http://www.knmi.nl/opera/odc.html ]. The
files by SMHI fail with this stack trace:
java.lang.IllegalStateException: DataObject doesnt start with OHDR
at ucar.nc2.iosp.hdf5.H5header$DataObject.<init>(H5header.java:1904)
at ucar.nc2.iosp.hdf5.H5header$DataObject.<init>(H5header.java:1818)
at ucar.nc2.iosp.hdf5.H5header.getDataObject(H5header.java:1668)
at ucar.nc2.iosp.hdf5.H5header.access$800(H5header.java:64)
at
ucar.nc2.iosp.hdf5.H5header$DataObjectFacade.<init>(H5header.java:1711)
at ucar.nc2.iosp.hdf5.H5header.readGroupOld(H5header.java:3545)
at ucar.nc2.iosp.hdf5.H5header.access$1000(H5header.java:64)
at ucar.nc2.iosp.hdf5.H5header$H5Group.<init>(H5header.java:1787)
at ucar.nc2.iosp.hdf5.H5header$H5Group.<init>(H5header.java:1756)
at ucar.nc2.iosp.hdf5.H5header.readSuperBlock1(H5header.java:266)
at ucar.nc2.iosp.hdf5.H5header.read(H5header.java:171)
at ucar.nc2.iosp.hdf5.H5iosp.open(H5iosp.java:108)
at ucar.nc2.NetcdfFile.<init>(NetcdfFile.java:1333)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:769)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:403)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:373)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:360)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:348)
at HDF5Test.main(HDF5Test.java:16)
Files by other institutions can be read without error messages. HDFView
and h5dump don’t seem to have problems with SMHI’s files. I have tried
netcdf-java 4.0, 4.1, and 4.2.
Do you have more insight into the HDF5 format an can comment on this
issue?
Please find attached the test program used and detailed debug output
for one of the files.
Thanks in advance,
Hermann
------------------------------------------------------------------------
_______________________________________________
netcdf-java mailing list
netcdf-java@xxxxxxxxxxxxxxxx
For list information or to unsubscribe, visit: http://www.unidata.ucar.edu/mailing_lists/
