Yes, I agree too that axis values should be monotonic.
I wonder if this requirement can/should be extended to two-dimensional
coordinate variables?
(
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.ht
ml#id2984605) It seems much more difficult in this case because in
certain convoluted cases, values that are next to each other in grid
space are not necessarily close in real space.
Jon
-----Original Message-----
From: cf-metadata-bounces at cgd.ucar.edu
[mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: 13 April 2010 08:13
To: John Caron
Cc: cf-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] longitude wrapping creates
non-monotoniccoordinate values
Dear John
I agree with you and Steve, and that is the approach I too have taken in
analysis software. "Monotonic" means the numbers must uniformly increase
or
decrease, and some of them will have to be wrapped round to achieve
this.
The CF checker should give an error for the file as it stands, because
monotonicity is a requirement in section 5 of
http://cf-pcmdi.llnl.gov/conformance/requirements-and-recommendations/1.
4/
Best wishes
Jonathan
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Received on Tue Apr 13 2010 - 02:57:10 BST
