Hi All,
Some users at NASA have to flatten their hierarchical files so that
the constituent groups can be checked for CF-compliance with standard
CF checkers that are not "group-aware". This can be painful if done by
"brute force": ncdump (or h5dump), strip out group info, rebuild each
group as flat netCDF3, pass to a checker. To accelerate this procedure
I've modified the script I mentioned earlier so it can call cfchecker:
http://nco.sf.net/nco.html#dismember
ncdismember is a script that calls ncks to extract each leaf group
into a netCDF3 file, as expected by most compliance checkers.
It calls cfchecker when invoked with an optional third argument of
'cf'. An example follows. Thanks to the Juelich group for making
cfchecker so painless to intall!
Enjoy,
cz
Dismembering:
zender at roulee:~$ ncdismember ~/nco/data/mdl.nc /data/zender/nco/tmp
Dismembering file /home/zender/nco/data/mdl.nc into following files:
/data/zender/nco/tmp/cesm.cesm_01.nc
/data/zender/nco/tmp/cesm.cesm_02.nc
/data/zender/nco/tmp/ecmwf.ecmwf_01.nc
/data/zender/nco/tmp/ecmwf.ecmwf_02.nc
Dismembering followed by cfchecker compliance check:
zender at roulee:~$ ncdismember ~/nco/data/mdl.nc /data/zender/nco/tmp cf
Dismembering file /home/zender/nco/data/mdl.nc into following files:
/data/zender/nco/tmp/cesm.cesm_01.nc
WARNING: Using the default (non-CF) Udunits database
/data/zender/nco/tmp/cesm.cesm_01.nc:
INFO: INIT: running CFchecker version 1.5.15
INFO: INIT: checking compliance with convention CF-1.5
INFO: INIT: using standard name table version: 25, last modified:
2013-07-05T05:40:30Z
INFO: INIT: using area type table version: 2, date: 10 July 2013
INFO: 2.4: no axis information found in dimension variables, not
checking dimension order
WARNING: 3: variable "tas" contains neither long_name nor standard_name
attribute
INFO: 3.1: variable "tas" does not contain units attribute
--------------------------------------------------
total files: 1, OK: 0, with warnings: 1, with errors: 0
/data/zender/nco/tmp/cesm.cesm_02.nc
WARNING: Using the default (non-CF) Udunits database
...
--
Charlie Zender, Earth System Sci. & Computer Sci.
University of California, Irvine 949-891-2429 )'(
Received on Thu Sep 26 2013 - 21:23:14 BST
