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#118: Add an attribute in Appendix F to identify in the geoid
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Reporter: jonathan | Owner: cf-conventions@…
Type: enhancement | Status: new
Priority: medium | Milestone:
Component: cf-conventions | Version:
Keywords: |
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Some geophysical quantities, including some vertical coordinates, are
defined with reference to the geoid. For example, the `standard_name` of
`altitude` is the height above the geoid. CF does not have a default
geoid, because the convention is used for both model-generated and real-
world data, and climate models typically do not use a real-world geoid.
When CF is used for real-world data, it may be necessary to desirable to
specify which geoid is being used.
This proposal is to define a new attribute `geoid_name` to be included in
the table of Appendix F for the legal attributes of the `grid_mapping`
variable. This attribute will have type S (string) and its description
will be "The name of the geoid. Corresponds to an OGC WKT VERT_DATUM
name."
[http://kitt.llnl.gov/trac/ticket/80 Ticket 80], which was agreed a long
time ago for inclusion in CF 1.7, also adds some attributes to Appendix F.
This proposal is complementary to and consistent with that one.
Jonathan Gregory
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Ticket URL: <http://kitt.llnl.gov/trac/ticket/118>
CF Metadata <http://cf-convention.github.io/>
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