Dear Aaron > I think there's a reason CF names don't naturally distinguish between > measured or observed values?CF names tend to describe the meaning of the > value, and explicitly avoids saying how it was derived. The derivation is > reserved to other attributes, like the 'source' (which should distinguish > between a model and an observation, though not in a computable way), or > 'history'.
I agree with this remark of John's. In fact, the main purpose of the CF standard names is to indicate which quantities should be regarded as comparable. Usually, we want to compare quantities derived from different sources (such as obs and models), so we give the corresponding quantities the same standard names, in order to indicate they can be meaningfully compared: that they are apples from different trees, rather than apples and oranges. Best wishes Jonathan > > On Dec 12, 2014, at 11:01, Aaron Sweeney <aaron.swee...@noaa.gov> wrote: > > > Hi, > > > > I've looked through the latest CF Conventions and CF Standard Names > > documents, but have been unable to find an answer (or example) to the > > following question: > > > > How do I indicate that a variable representing a physical quantity is > > an in situ observation, a value that came from a model, or a difference or > > residual between an observation and a modelled value (observed minus > > modelled)? > > > > My initial thought was to use the same standard name for each variable, > > but provide a standard name modifier. But after reading the appendix on > > modifiers, they seem to be used for something else. The standard names > > themselves only describe the physical quantity, but not whether or not they > > are an observed value or modelled value. > > > > Please point me toward the appropriate documentation, if it exists. > > Thanks for your kind attention. > > > > Cordially, > > Aaron > > > > -- > > Aaron D. Sweeney > > Water Level Data Manager > > > > Cooperative Institute for Research in Environmental Sciences (CIRES) > > University of Colorado at Boulder > > and > > NOAA National Geophysical Data Center > > Marine Geology and Geophysics Division > > 325 Broadway, E/GC3 > > Boulder, CO 80305-3328 > > > > Phone: 303-497-4797, Fax: 303-497-6513 > > > > DISCLAIMER: The contents of this message are mine personally and do not > > necessarily reflect any position of NOAA. > > > > _______________________________________________ > > CF-metadata mailing list > > CF-metadata@cgd.ucar.edu > > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ----- End forwarded message ----- _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
