Hi Jonathan,
Sounds like a useful addition, I think that it would be really useful to describe the actual line (and regions) in geospatial coordinates as you have suggested. To my knowledge CF does not have any convention prescribed for how to do this. These are the type of "features" that are typically modelled by GML following the ISO19xxx standards, hence it make sense to try and use direct mappings to how GML would describe them.
Cheers,
Ag
-----Original Message-----
From: cf-metadata-bounces at cgd.ucar.edu on behalf of Jonathan Gregory
Sent: Sun 10/07/2005 9:15 AM
To: cf-metadata at cgd.ucar.edu
Subject: [CF-metadata] transport across line
Dear all
A postscript to my posting about new standard names: One of them is
"sea_ice_transport_across_line" (kg s-1), where transport_across_line has been
defined to mean that which crosses a particular line on the Earth's surface;
formally this means the integral along the line of the normal component of the
transport. To use this informatively we will need a standard_name of "line"
and a list of its possible values, as we have done for "region". The only line
initially proposed is fram_strait, but for other oceanographic quantities you
can imagine many which would be useful, such as drake_passage, davis_strait,
straits_of_gibraltar, bering_strait and the many ocean-crossing sections which
have been occupied. Like the regions, these names give a fairly precise
definition to a geographical entity whose precise realisation will differ from
model to model with the grid. If necessary, both region and line could be
precisely described with a polyline of (lat,lon) coordinates, but so far
no-one has asked for this.
Does this seem sensible?
Cheers
Jonathan
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Received on Mon Jul 11 2005 - 03:44:12 BST
