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[netCDF #OCI-248391]: netCDF General - Data compression FAQ

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  • Subject: [netCDF #OCI-248391]: netCDF General - Data compression FAQ
  • Date: Wed, 28 Feb 2007 12:49:06 -0700
> Institution: University of Alaska Fairbanks
> Package Version: 3.6
> Operating System: Linux
> Hardware Information: x886
> Inquiry: Would it be possible to get an FAQ or summary document written 
> regarding internal NetCDF 3.6 and 4.0 data compression, compaction, and 
> packing. This question comes up fairly often and it would be useful to have a 
> FAQ answer to refer users to.
> 
> We know how to externally compress (bzip, etc), but reducing the size of all 
> those redundant data values natively through compaction is a desired feature. 
> I think I've found the answer (no at 3.6 and yes through hdf5 at 4.0) among 
> the support documents and forums, but I think the topic would benefit from a 
> summary document.
> 
> Thanks!
> -Tom
> 
> 

Howdy Tom!

Take a look here:

http://www.unidata.ucar.edu/software/netcdf/docs/faq.html#compression

Seems that there is an internal method available with 3.3.1, but this is not 
supported by Unidata (however it looks like a good idea!)

As you note, netCDF-4 supports compression on a per-variable basis. We await 
HDF5 1.8.0 beta to release our beta.

Thanks,

Ed

Ticket Details
===================
Ticket ID: OCI-248391
Department: Support netCDF
Priority: Normal
Status: Closed