Announcing Netcdf-Java / CDM version 4.3.8 BETA
We are feature complete on this version, but there are some major
changes that need your help in testing.
In particular, version 4.3 is a complete rewrite of GRIB1 and GRIB2
file handling. Version 4.2 GRIB handling is wrong in a number of ways,
especially table handling for non NCEP files, and time interval
coordinate handling. If you are using CDM or TDS to read GRIB files,
you want to upgrade as soon as possible. If you are running a nuclear
power plant with GRIB files, please immediately do an emergency shutdown
and remain offline until you can inspect.
If you are depending on the CDM/TDS to read GRIB files, you must upgrade
to 4.3 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. Note that we will not backport fixes to version 4.2.
Note that the variable names in 4.3 will be different from those in 4.2.
Evolving documentation for GRIB is
at:http://www.unidata.ucar.edu/software/netcdf-java/formats/GribTables.html
In addition to GRIB files, version 4.3 also:
1. handles the CF calendar attribute
(http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#calendar)
2. allows a new syntax for calendar dates
(http://www.unidata.ucar.edu/software/netcdf-java/CDM/CalendarDateTime.html)
3. implements the official version of the CF 1.6 Discrete Sampling
Geometries
(http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#discrete-sampling-geometries)
4. supports client side certificates in OPeNDAP
5. has functioning maven builds, with refactored modules
6. has complete source at https://github.com/Unidata/thredds
If you need any of this, please test and give feedback now, while there
is time to make changes. TDS version 4.3 (beta) will also be available
shortly, but its much easier to test things with CDM and ToolsUI than in
the TDS.
Thanks,
John
