#147: clarification of standard and correction of conformance doc: formula_terms
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Reporter: taylor13 | Owner: cf-conventions@…
Type: defect | Status: new
Priority: high | Milestone:
Component: cf-conventions | Version:
Resolution: | Keywords:
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Comment (by taylor13):
Dear Jonathan,
Christmas is nigh, so I'll try to be brief; one more try at explaining my
position.
In Section "7.1 Cell Boundaries", we state: "To represent cells we add
the attribute bounds to the appropriate coordinate variable(s)." I think
the important part of this sentence is that the bounds attribute is used
to provide information about the *cell*; this is more important than
mentioning that they get attached to coordinates.
Currently, the standard clearly limits its discussion of "cells" to grids
(of 1 or more dimensions). I would argue we should keep it that way
because it keeps the concept simple.
In short my argument is:
1. keep the current definition of "cells"
2. continue to limit the use of "bounds" to describing cells.
I see no compelling use case for modifying (and complicating) this
beautifully-constructed aspect of CF.
If we generally allowed bounds to be attached to variables appearing in
formula terms (that are not themselves coordinate variables), we would
have to modify our definition of a "cell" or define "bounds" in a way that
does not relate them to cells.
As we both agree, we can find the terms needed to interpret parametrically
defined coordinates through the formula_terms, which under my proposal can
be attached to the coordinate values themselves and to their bounds. Why
complicate things?
If you want to complicate things, I think you will have to rewrite at
least section 7.1 and the introduction to section 7. Do you propose to do
that? (I hope not.)
best wishes for the holidays,
Karl
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Ticket URL: <http://cf-trac.llnl.gov/trac/ticket/147#comment:13>
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