[CF-metadata] Reverse-time trajectory

Hattersley, Richard richard.hattersley at metoffice.gov.uk
Mon Apr 30 07:36:54 MDT 2012


Hi all,

The CF definitions of discrete sampling geometries define the "trajectory" feature type as "a series of data points along a path through space with monotonically increasing times". This is a stricter stance than the usual CF coordinate definition of "ordered monotonically". What was the reason behind the addition of the "increasing" constraint, and can it be relaxed? We have data sets where a model is run backwards in time.

Thanks,
Richard Hattersley  AVD  Iris Technical Lead
Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB  United Kingdom
Tel: +44 (0)1392 885702  Fax: +44 (0)1392 885681
Email: richard.hattersley at metoffice.gov.uk  Website: www.metoffice.gov.uk

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