If netcdf-4 is an option for you, it might be simpler to compress (deflate) the coordinate variables, this works transparently.
Etienne On Tue, Apr 10, 2012 at 2:40 PM, David Hassell <[email protected]> wrote: > Hello Randy, > > I, too, recently thought about this when working on some CF processing > software (cf-python), but couldn't think of a use case so didn't > pursue it - and now you have one! > > It seems to me that the use of scale_factor and add_offset is intended > for (but not restricted to ...?) the reduction of dataset size > (chapter 8). Is the requirement in your example for space saving, or > some other convienience? I personally think that the latter case is > better served by an appropiate setting of the units attribute (such as > units="0.555555555555556 K @ 459.67" if we have converted from Kelvin > to Fahrenheit). > > Anyway, I can't think of a reason not to allow these attributes on > coordinates - these variables can be very large, after all. > > All the best, > > David > > ---- Original message from Randy Horne (01PM 05 Apr 12) > >> Date: Thu, 5 Apr 2012 13:05:45 -0400 >> From: Randy Horne <[email protected]> >> To: [email protected] >> X-Mailer: <IMail v8.21> >> Subject: [CF-metadata] Using add_offset & scale_factor with coordinate >> variables >> >> Folks: >> >> Appendix A, Table A.1 in the CF conventions state that add_offset and >> scale_factor can be used with data variables, but not coordinate variables. >> >> For the data producing system I am working (GOES-R Ground Segment) it is >> particularly convenient to make use of add_offset and scale_factor with our >> coordinate variables. >> >> Is there an issue with changing the conventions to allow this ? >> >> very respectfully, >> >> randy >> >> >> >> >> ..............End of Message ...............................--> >> >> >> >> >> _______________________________________________ >> CF-metadata mailing list >> [email protected] >> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > > -- > David Hassell > National Centre for Atmospheric Science (NCAS) > Department of Meteorology, University of Reading, > Earley Gate, PO Box 243, > Reading RG6 6BB, U.K. > > Tel : 0118 3785613 > Fax : 0118 3788316 > E-mail: [email protected] > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
