The NetCDF-Java/Common Data Model (CDM) library version 4.3.14 was released on November 20, 2012. The latest update can be downloaded from the NetCDF Java Library download page or from Unidata's GitHub repository.
Version 4.3 includes a complete rewrite of GRIB1 and GRIB2 file handling, intended to correct problems that exist in version 4.2's handing of tables (especially in non-NCEP files) and time interval coordinates.
Note: The variables in a GRIB dataset will have different names when viewed in CDM 4.3 than the same variables when viewed in CDM 4.2. If your application reads GRIB files, we strongly recommend that you upgrade to the latest version of the NetCDF-Java/CDM library and closely examine the output of any files that you really care about. Check parameter names and everything else against the original documentation if possible, especially if there is any local parameter use. Please send us any files you suspect might be incorrectly read by the CDM library.
Evolving documentation for GRIB is at Unidata's Grib Tables page.
In addition to the GRIB changes, version 4.3:
- handles the CF calendar attribute
- allows a new syntax for calendar dates
- implements the official version of the CF 1.6 Discrete Sampling Geometries
- supports client side certificates in OPeNDAP
- has functioning maven builds, with refactored modules
The NetCDF-Java/CDM library version 4.3.14 also includes beta functionality to write netCDF-4 files.
The NetCDF-Java development team at the Unidata Program Center strongly encourages operators of sites that take advantage of the CDM libraries to install the latest version and forward any potential issues to the development team via Unidata's support system (support-netcdf-java@unidata.ucar.edu) or the user community mailing list (netcdf-java@unidata.ucar.edu). Real-world use of new features by the user community is integral to the process of creating and refining these libraries.
For additional information, see the NetCDF-Java Library page.
