** Description changed: - To the maintainers of the cdo package in ubuntu. + [IMPACT] - Dear ubuntu cdo package maintainers, I already posted "question" about this same issue I'm reporting here, but it expired, so I'm posting again this same issue in here, hoping to have some response or at least some directions on how to behave to help and fix the problem. I found a mismatch between what cdo is supposed to do and what it actually does. - I downloaded and installed the cdo package from the ubuntu official repositories (I'm using ubuntu 12.04). I wanted to use one of the cdo operators, sellonlatbox, on a weather forecast GRIB 1 datafile. The selection of the subdomain works fine, but however the resulting output file loses the information about the forecast lead time. - At first I thought it was a problem of the cdo software itself, and I posted a support request, to state the possible presence of a bug in their software to the developers of the cdo. You can find my complete report here: + By default installed cdo lost data in grib1 files due to using grib_api + instead of cgribex. Support for grub1 files in grib_api is experimental + and unstable according to upstream: - https://code.zmaw.de/boards/1/topics/1171 + https://code.zmaw.de/boards/1/topics/1540 - I went on with my investigation to what was showing me as a bug, a misfunctioning of the cdo software. I compared with a colleague of mines, who does not use nor ubuntu nor debian but fedora. In his system, everything was working correctly. - So I tried to download from the CDO website + The fix is to compile the package with the flag --enable-cgribex - https://code.zmaw.de/projects/cdo + [TESTCASE] - the source code of version 1.5.3, which is the one available in the ubuntu repositories, and not working on my system. - I compiled the cdo source package downloaded from the site with: + * Install cdo package $ sudo apt-get install cdo + * Download and test how it works with grib1 files + $ wget https://code.zmaw.de/attachments/3103/t2m_ei_1979.grb + $ cdo sellonlatbox,23,31,-25,-31 t2m_ei_1979.grb tagliato_t2m_ei_1979.grb + $ wget ftp://ftp.cpc.ncep.noaa.gov/wd51we/wgrib/wgrib.c + $ gcc -o wgrib wgrib.c + $ ./wgrib -v tagliato_t2m_ei_1979 | head -n 8 + 1:0:D=1979010100:2T:sfc:kpds=167,1,0:anl:type=analysis:winds are N/S:"2 metre temperature [K] - configure --with-netcdf=/usr --with-jasper=/usr --with-grib-api=/usr --with-proj=/usr - make - make install + The 'anl' word in the output means it has just lost the hour data - This installation works good (and also much faster than the cdo software installed by the ubuntu software centre). - For this compilation, I used the standard compilers available with ubuntu (I mean, I do not have any proprietary compiler on my computer, only the standard ubuntu tools). The libraries I used for linking are the ones already available in the ubuntu software centre, namely provided by the netcdf-dev package (1:4.1.1-6), the libjasper-dev (1.900.1-13), libgrib-api-dev (1.9.9-3) and libproj-dev (4.7.0-1). - Please, let me know how the work will go on to solve the problem. I can provide more details to more specific questions, even if I tried to be as complete as possible in this report. - One more note: in my post on the cdo forum I referenced above, I mentioned the wgrib utility. The wgrib utility I used is the one available within the grads package installed by the ubuntu software centre (version 2.0.a9-4). + * Update package + * Rerun the test + $ ./wgrib -v tagliato_t2m_ei_1979 | head -n 81:0:D=1979010100:2T:sfc:kpds=167,1,0:3hr:type=analysis:winds are N/S:"2 metre temperature [K] - Faithfully - Marco Galli + Now instead of 'anl' it has '3hr' + + [Regression Potential] + + * There is a bug in Debian: + http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=633934 + + Which introduced the bug to fix a behavior with grub2 files, however + since grub2 files has nothing to do with cgribex it's unlikely to + provoke it. + + * It may fail if people try to use the program with non common grub1 + files + + https://code.zmaw.de/boards/1/topics/713#message-716 + + [Other Info] + + * The --enable-cgribex flag has been enabled in Debian since it + provides a better default for general use + + http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695009
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