[CF-metadata] subgrid variation

[Brian Eaton]

Hi Jonathan,

I'm in favor of this well thought out proposal. It certainly clarifies some
of the ambiguity in the current scheme.  I have a couple of suggestions:

1. I think the cell_methods values should be single tokens with blank spaces
   replaced by underscores, e.g., mean_over_sea instead of "mean over sea".

2. It may be convenient to use the same qualifiers as are used in the
   standard names.  So replace over_TYPE by where_TYPE.

3. It may be convenient to allow a generic qualifier like "where_defined"
   which could be used in most (all?) instances instead of the more
   specific versions "where_TYPE".

Brian

On Wed, Jan 05, 2005 at 11:46:26AM +0000, Jonathan Gregory wrote:
> Summary of proposals:
> 
> (1) Retain the default "point" interpretation and clarify what it means.
> 
> (2) Make cell_methods mandatory if standard_name is supplied.
> 
> (3) Clarify that unqualified gridbox area-mean implies the entire gridbox.
> 
> (4) Introduce "over TYPE" qualifiers for spatial and temporal cell_methods.
> 
> (5) Introduce "area:" entries for spatial cell_methods.