Tom Rink wrote:
Hi,
We would like to use the Java-NetCDF library, which I believe is
the basis of the CDM, for reading HDF5 files. Since the final
version of these files has not been finalized, we need to know if
the Java-NetCDF library can completely read *any* HDF5 file
produced by the native version of the HDF5 library. Is it possible
to use some HDF5 structure for data that would not be even
recognized, and thus, and be readable?
Tom
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Hi Tom:
As of version 4.1, the CDM can read all versions of HDF5 through version
1.8.4, except for the following HDF5 features:
SZIP compression. The SZIP library is proprietary and does not have a
Java implementation. Its not clear if we can even legally write one if
we wanted to.
Dataset region references. These are used in NPOESS, but their purpose
is unclear. Since they point to other datasets that are accessible
through the CDM, all the data in the file can still be read by the CDM.
However, whatever information the region reference represents is not
currently accessible.
There may be something Ive missed, but its likely minor and would be
considered a bug (ie fixed). Ive heard rumors of new features in future
versions of HDF5, so stick with 1.8 for now.
