Dear Thomas > At the current stage, it would be valid to define an umbrella vector variable > from two component variables, one being dX(time,xc,yc) and > dY(time,height,xc,yc). What would be the meaning of such a construct? And if > invalid, how can we enforce that the component variables have to somehow > share the same dimensions? Would a sentence in the convention be enough to > avoid these constructs?
I suppose that you could say that all the data variables named by the umbrella must have the same set of coordinate axes, identified by the standard_names of their coordinate variables, although they do not have to have the same sets of coordinate values. This would exclude, for instance, one data variable having time-latitude-longitude and another time-altitude- latitude-longitude as coordinate variables, but it would permit components on an Arakawa C-grid. Would that be sufficient? Best wishes Jonathan _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
