John - > 1) possible recommendations by CF to always include the datum, and making > sure we have the right metadata to do so.
> 2) possible recommendations by CF as to what to do if the datum is not > present, or is only partially specified. yes I think that's right. Personally I'm not in favour of a default datum - if the datum is unknown this should be expressed clearly. Jon -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Caron Sent: 03 August 2011 15:28 To: [email protected] Subject: Re: [CF-metadata] the need to store lat/lon coordinates in a CF-compliant netCDF file On 8/3/2011 8:19 AM, Jon Blower wrote: > Hi all, > > I've been following this thread with great interest. For me it boils down to > this question: > > - Is the datum always known by the data provider? > > If the answer is "yes" then I see no reason to omit the datum (and plenty of > reasons to include it). If there *are* situations where the datum is > genuinely unknown or undefined then we need to express this clearly too so > users can beware. > > (Previous posts mentioned GCMs as possible situations where the datum > is unknown - is this really true? Surely there is always a sphere > with a known radius on which coordinates are based?) > > Cheers, > Jon > > -- > Dr Jon Blower > Technical Director, Reading e-Science Centre Environmental Systems > Science Centre University of Reading, UK > Tel: +44 (0)118 378 5213 > http://www.resc.reading.ac.uk > > > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata Just to add to the above, there are 2 issues we are discussing: 1) possible recommendations by CF to always include the datum, and making sure we have the right metadata to do so. 2) possible recommendations by CF as to what to do if the datum is not present, or is only partially specified. John _______________________________________________ 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
