Re: [netcdfgroup] Specification for NC_64BIT_DATA format

[Dennis Heimbigner <dmh@xxxxxxxx>]

This format is usually called CDF5 or NC_64BIT_DATA (as defined in 
netcdf.h).
=Dennis Heimbigner
  Unidata

On 7/30/2018 3:49 PM, Stephan Hoyer wrote:
> The documentation for netCDF4-Python writes:
> 'NETCDF3_64BIT_DATA' is the 64-bit data version of the netCDF 3 file 
> format, which supports 64-bit dimension sizes plus unsigned and 64 bit 
> integer data types, but is only compatible with clients linked against 
> netCDF version 4.4.0 or later.
>
> This seems generally useful, so I'm interested in implementing support 
> for this format in the netCDF3 module included in SciPy:
> http://scipy.github.io/devdocs/generated/scipy.io.netcdf_file.html
>
> However, I can't seem to find a description of this format in the 
> netCDF file format specification:
> https://www.unidata.ucar.edu/software/netcdf/docs/file_format_specifications.html
>
> Is a full specification for this variation available somewhere? If 
> not, I would encourage updating the specifications doc. One of the 
> strengths of netCDF (especially netCDF3) is that it is clearly 
> specified and has multiple independent implementations :).
>
> Cheers,
> Stephan
>
>
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