We've developed low level access to NetCDF-4/HDF5 using the JNA and the
NetCDF-4 4.1.3 C library. We'd be happy to share this with you but i'll warn
you that it's a very light wrapper on top of the C library and doesn't leverage
any of the NetCDF-Java API for writing. The files can be read in NetCDF-Java
with some caveats if you are using NetCDF-4 compound data types.
We're also looking at streaming data out (appending) and have settled on a
discrete sampling geometry format that should let us write station time series
data with time as the outer dimension using ragged-indexed arrays and NetCDF-4
compound data types (structures) with some storage overhead.
If you interested in our code let us know.
On Oct 17, 2011, at 12:35 PM, Christopher Mueller wrote:
> NetCDF-Java Folks,
> We have a need to write NetCDF4/HDF5 files from within a project that already
> has a significant framework developed in Java. We also have a firm
> requirement to be able to "append" to existing files - which (unfortunately)
> takes the Nujan library off the table (at least in it's current incarnation).
> I see from the NetCDF-Java FAQ
> that you are considering a JNI approach for writing NetCDF4 from NJ, and I'd
> like to put my vote in for that. The HDF Team supports JNI Java modules for
> Windows, Linux and Mac - wouldn't it be relatively straightforward to
> integrate those into the NetCDF-Java distro to give it NC4 writing capability?
> As part of such an addition (including & using the JHI & JHI5 libraries),
> would you also consider refactoring the current HDF read support to utilize
> the JNI libraries?
> Christopher Mueller | Scientific Developer
> Applied Science Associates
> 55 Village Square Drive | South Kingston, RI 02879 USA
> p: +1 401-789-6224 | c: +1 401-219-2490 | f: +1 401-789-1932
> e: cmueller@xxxxxxxxxxxxxx | www.asascience.com
> ASA | Science. Services. Solutions
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