Re: [netcdf-java] Quantize Support in netCDF-Fortran: Only Bit Groom possible?

• To: Joe Lee <hyoklee@xxxxxxxxxxxx>
• Subject: Re: [netcdf-java] Quantize Support in netCDF-Fortran: Only Bit Groom possible?
• From: John Caron <jcaron1129@xxxxxxxxx>
• Date: Sat, 10 Jun 2023 06:32:21 -0600

Apparently its not needed for reading data:

"As part of the netcdf-c library, the quantize algorithms are available for
netCDF/HDF5 files, and the new ncZarr format, and produce data files that
are fully backward compatible for all versions of netcdf-c since 4.0, and
also fully compatible with netcdf-Java."

(see https://github.com/Unidata/netcdf-c/blob/main/docs/quantize.md)

On Fri, Nov 4, 2022 at 11:51 AM Joe Lee via netcdf-java <
netcdf-java@xxxxxxxxxxxxxxxx> wrote:

> Does the current netCDF-Java also support it?
>
> I’m mostly concerned about Data Interoperability.
>
>
>
> *From: *netcdfgroup <netcdfgroup-bounces@xxxxxxxxxxxxxxxx> on behalf of
> Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] via
> netcdfgroup <netcdfgroup@xxxxxxxxxxxxxxxx>
> *Date: *Friday, November 4, 2022 at 12:40 PM
> *To: *netcdfgroup@xxxxxxxxxxxxxxxx <netcdfgroup@xxxxxxxxxxxxxxxx>
> *Subject: *[netcdfgroup] Quantize Support in netCDF-Fortran: Only Bit
> Groom possible?
>
> netCDF List,
>
>
>
> I am looking to extend the model I work on, GEOS, to support using the new
> quantize options in netCDF. My question is: am I right in my reading of
> netCDF-Fortran that only Bit Groom is supported?
>
> I can see in netCDF-C that there seem to be three variants:
>
>
>
>    - Bit Groom
>    - Granular Bit Round
>    - Bit Round
>
>
>
> (see https://github.com/Unidata/netcdf-c/blob/main/docs/quantize.md)
>
>
>
> but in the netCDF-Fortran docs I only see it mention Bit Groom and my
> reading of the include files seem to back that up.
>
>
>
> 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?
>
>
>
> Thanks,
>
> Matt
>
>
>
> --
>
> Matt Thompson, SSAI, Ld Scientific Programmer/Analyst
>
> NASA GSFC,    Global Modeling and Assimilation Office
>
> Code 610.1,  8800 Greenbelt Rd,  Greenbelt,  MD 20771
>
> Phone: 301-614-6712                 Fax: 301-614-6246
>
> *http://science.gsfc.nasa.gov/sed/bio/matthew.thompson
> <http://science.gsfc.nasa.gov/sed/bio/matthew.thompson>*
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