Dear Randy,
Will the method accepted in ticket 70
(
https://cf-pcmdi.llnl.gov/trac/ticket/70) work for you?
"The expanded form of the grid_mapping attribute is required if one
wants to store coordinate information for more than one coordinate
reference system"
Something like this, perhaps:
float data_var
data_var:grid_mapping = "latitude-longitude: <associated coordinates> geostationary: <associated coordinates>"
char latitude-longitude // grid mapping
char geostationary // grid mapping
All the best,
David
---- Original message from Randy Horne (09PM 19 Dec 13)
> From: Randy Horne <rhorne at excaliburlabs.com>
> Date: Thu, 19 Dec 2013 21:26:20 -0500
> To: "cf-metadata at cgd.ucar.edu" <cf-metadata at cgd.ucar.edu>
> X-Mailer: Apple Mail (2.1510)
> Subject: [CF-metadata] one data variable is associated with two grid
> mappings
>
> Folks:
>
> We have a product with a data variable containing 10 degree latitude band statistics (i.e. min, max) derived from observation data whose east/west extents are associated with the field of view of a geostationary satellite (i.e. the recently defined geostationary grid mapping / projection).
>
> The implication is that this data variable is associated with two different grid mappings (latitude-longitude & geostationary). Workarounds to represent the east/west grid boundaries on the latitude-longitude grid mapping are unappealing due to the different geometries associated with the two projections.
>
> Thoughts ?
>
>
> very respectfully,
>
> randy
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--
David Hassell
National Centre for Atmospheric Science (NCAS)
Department of Meteorology, University of Reading,
Earley Gate, PO Box 243,
Reading RG6 6BB, U.K.
Tel : +44 118 3785613
E-mail: d.c.hassell at reading.ac.uk
Received on Fri Dec 20 2013 - 02:17:04 GMT
