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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Hi Ted, > Correct, but writing is with zlib only, not szip. Szip is read-only > for some reason (and hdf5 has to be compiled with szip support). The > ability to write with szip compression was added briefly, but was > quickly removed -- for some reason that didn't make sense to me. The Szip software is encumbered with licensing restrictions and software patents that prevent its use in commercial applications without a separate commercial license. This means some netCDF users could not legally use Szip encoding. We want netCDF to be open source software for both non-commercial and commercial use, so we don't include Szip encoding capabilities. More information about Szip licensing, copyright, and patents is here: http://www.hdfgroup.org/doc_resource/SZIP/Commercial_szip.html --Russ > -- Ted > > > On Aug 21, 2012, at 8:40 PM, William Oquendo wrote: > > > Hello, > > Just to say I have found that indeed is possible to do compression (per v= > ariable). In particular, I am using the setCompression function in the cxx= > interface. = > > > = > > > Best regards / Cordialmente, > > = > > > William-Fernando Oquendo > > -------------------------- > > Este correo puede carecer de tildes o e=F1es debido al teclado. = > > > = > > > = > > > = > > > = > > > On Tue, Aug 21, 2012 at 7:56 PM, William Oquendo <woquendo@xxxxxxxxx> wro= > te: > > Dear all, = > > > = > > > After reading the mailing archives, it is clear that originally netcdf wa= > s able to be compiled with compressed libraries in order to READ compressed= > files. > > With the current version of netcdf (4.2.1), compiled with hdf5support and= > szip, is it possible to WRITE compressed files? If not, is this planned? > > And another possibly silly question, just to know: If I compiled my netcd= > f installation with hdf5 support, will all my netcdf files be actually hdf5= > files? > > Thanks for your kind help. > > = > > > Best regards / Cordialmente, > > = > > > William-Fernando Oquendo > > -------------------------- > > Este correo puede carecer de tildes o e=F1es debido al teclado. = > > > = > > > = > > > = > > > _______________________________________________ > > netcdfgroup mailing list > > netcdfgroup@xxxxxxxxxxxxxxxx > > For list information or to unsubscribe, visit: http://www.unidata.ucar.e= > du/mailing_lists/ > > _______________________________________________ > netcdfgroup mailing list > netcdfgroup@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: http://www.unidata.ucar.edu= > /mailing_lists/=20
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