[cf-pointobsconvention] Draft 2

[Don Murray]

John-

John Caron wrote:

>> Re the Z axis, it would be nice to know for sure whether the Z axis
>> should be interpreted as 'surface'.  (Other possible surfaces
>> exist, and I suppose an abstract form of Z is also possible.  So if
>> we want determinism, we could either say "lack of characterization
>> always means surface" or "Z must be described, if only to say it is
>> 'surface'.")
> 
> Yes, after thinking more about it, Im not so sure we should allow
> data that doesnt have a z coordinate. A standard I think should be
> allowed to insist on things like this.

Then what do you do with a hurricane track that does not have
an z associated with it?  Or a trajectory from ship point obs
that only have a latitude/longitude?  It seems like wasted
space to have to write out 0 for z for every point if you don't
have it and there are plenty of datasets out there without a
Z value.

Don
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray at unidata.ucar.edu                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
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