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I have submitted a PR to netcdf-fortran with the fix and tests: https://github.com/Unidata/netcdf-fortran/pull/383 On Fri, Nov 4, 2022 at 1:23 PM Edward Hartnett - NOAA Affiliate < edward.hartnett@xxxxxxxx> wrote: > I will submit a PR with a fix for the missing constants in netcdf-fortran. > > It's entirely my fault - but will be fixed for the next release. > > Until then, just use the constants 2 and 3, as defined in the C netcdf.h > file: > > #define NC_QUANTIZE_BITGROOM 1 /**< Use BitGroom quantization. */ > #define NC_QUANTIZE_GRANULARBR 2 /**< Use Granular BitRound quantization. > */ > #define NC_QUANTIZE_BITROUND 3 /**< Use BitRound quantization. */ > > > On Fri, Nov 4, 2022 at 12:22 PM Charlie Zender <zender@xxxxxxx> wrote: > >> Hi Matt, >> >> > So I was wondering: Is there a fundamental Fortran reason for not >> supporting the other two variants? Or perhaps, is it that, of the three >> variants, Bit Groom is by far the one people should use, so that's what >> was exposed by the Fortran interface? >> >> Great question. No fundamental reason. >> All three quantization methods are >> intended to be in the netCDF Fortran library via >> the same API as BitGroom. >> I'm unsure about the status of Granular BitRound >> and BitRound in the latest Fortran release. >> Others can chime in about that. >> When all three are available in your Fortran >> library, I recommend using either Granular BitRound >> (with number of significant digits) or BitRound >> (with number of stored bits). They both yield >> better compression than BitGroom, as shown here: >> >> https://nco.sourceforge.net/nco.html#fgr_003aqnt_005fcr_005fzst >> >> Charlie >> -- >> Charlie Zender, Earth System Sci. & Computer Sci. >> University of California, Irvine 949-891-2429 )'( >> >> _______________________________________________ >> NOTE: All exchanges posted to Unidata maintained email lists are >> recorded in the Unidata inquiry tracking system and made publicly >> available through the web. Users who post to any of the lists we >> maintain are reminded to remove any personal information that they >> do not want to be made public. >> >> >> netcdfgroup mailing list >> netcdfgroup@xxxxxxxxxxxxxxxx >> For list information or to unsubscribe, visit: >> https://www.unidata.ucar.edu/mailing_lists/ >> >
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