[netcdfgroup] netCDF Operators NCO version 4.7.5 have hatched

• To: NCO Announce Mail List <nco-announce@xxxxxxxxxxxxxxxxxxxxx>, netCDF Mail List <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] netCDF Operators NCO version 4.7.5 have hatched
• From: Charlie Zender <zender@xxxxxxx>
• Date: Sun, 10 Jun 2018 12:34:56 -0700

The netCDF Operators NCO version 4.7.5 have hatched.

http://nco.sf.net (Homepage, Mailing lists, Help)
http://github.com/nco (Source Code, Issues, Releases, Developers)

What's new?
Version 4.7.5 is primarily a bugfix release for a single issue with
ncremap. Version 4.7.4 inadvertently introduced a bug that mainly
affects regridding of ALM/CLM/CTSM/ELM land model data that contains
"hidden" (unused) dimensions. The other new feature is that ncclimo
automatically handles MPAS Seaice model output named with the new
names (mpassi) and new date convention, yyyy-mm-01-00000. If these
fixes/features do not affect you there may be no reason to upgrade,
yet see below for other minor new features you may want.

Work on NCO 4.8.0 has commenced "under the hood". Printing of netCDF4
user-defined types ENUM and VLEN is ready now (though unsupported)
with the --ntm flag. 4.8.0 will contain the finished version of that,
progress on parallel weight generation by ncremap, and possibly a
workaround for using quotation marks with ncap2 in Windows.

Enjoy,
Charlie

NEW FEATURES (full details always in ChangeLog):

A. ncclimo accepts mpassi in place of mpascice, mpasseaice, and
   accepts new MPAS output filenames of form yyyy-mm-01-00000
   ncclimo -s 2 -e 3 -m mpassi -i drc_in -o drc_out
   http://nco.sf.net/nco.html#ncclimo

B. ncap2 allows optional scale_factor/add_offset arguments to its
   pack() method for those who wish to specify their own packing
   parameters. This override can ensure that multiple files use the
   same packing parameters.
   ncap2 -s 'var_pck=pack(var,-0.001,40.0)' in.nc out.nc
   http://nco.sf.net/nco.html#ncap2_mth

C. NCO's security whitelist allows an extended character set when the
   input file explicitly invokes the DAP4 protocol (e.g.,
   dap4://foo.com/in.nc). This allows DAP4 input to utilize the full
   set of constraint expressions.
   http://nco.sf.net/nco.html#wht_lst

D. XML printing now includes the "ncml:" prefix on most tags.
   This aligns NCO XML with XML produced by toolsUI version 4.6.11,
   the latest (AFAICT) netCDF Java libsrary. If this change bothers
   you or breaks your XML workflow, let us know and we can make it
   optional.
   http://nco.sf.net/nco.html#xml

E. Repeated notice: netCDF 4.6.1 fixes the CDF5 bug. Yay!
   We STRONGLY recommend that CDF5 users upgrade to netCDF 4.6.1.
   NCO error messages and HINTs have been updated to better describe
   the best practices to identify and avoid this nasty bug.
   http://nco.sf.net#bug_cdf5

BUG FIXES:

A. ncremap fixes the algorithm that identifies unstructured dimensions
   to now check that size of candidates matches the size expected by
   the mapping file. Failures then fall-back to PJCS mechanism of
   searching for dimension with expected size. This fixes a bug
   introduced in 4.7.4 where "hidden" (unused) dimensions can
   supercede "visible" dimensions and crash the regridder.
   Thanks to Sterling Baldwin for reporting this issue.

Full release statement at http://nco.sf.net/ANNOUNCE

--
Charlie Zender, Earth System Sci. & Computer Sci.
University of California, Irvine 949-891-2429 )'(