Hi Randy,
You described your simplified structure as:
data(index)
... but that implies only a single observation for each trajectory.
So I'm wondering if that was a typo, and you meant:
data(observation)
... which then implies a single trajectory with multiple observations.
So, if you only have only one hurricane in each product then example
H.13 seems to be exactly what you're after.
(Otherwise you're probably looking at example H.15 if you want to easily
append new data.)
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: [email protected] Website:
www.metoffice.gov.uk
> -----Original Message-----
> From: CF-metadata [mailto:[email protected]]
> On Behalf Of Randy Horne
> Sent: 20 August 2012 14:52
> To: [email protected]
> Subject: [CF-metadata] use of the "trajectory" discrete
> sampling geometryfor a hurricane intensity product
>
> For the "trajectory" discrete sampling geometry, the data
> design pattern for the data and coordinate variables are:
>
> data(index, observation)
>
> x(index, observation)
> y(index, observation)
> z(index, observation)
>
>
> The hurricane product grows with a new hurricane intensity
> value is added every 30 minutes.
>
> For this product, the simplest thing to do is increment the
> index for each new hurricane intensity value. Given this the
> data and coordinate variables look like:
>
> data(index)
>
> x(index)
> y(index)
> z(index)
>
> This looks like a "point" discrete sampling geometry even
> though it is a trajectory.
>
> Would a hurricane intensity product designed like a point
> discrete sampling geometry but identified as a trajectory
> (cf_role = "trajectory_id") be in conformance with the CF
> conventions ?
>
>
>
> ..............End of Message ...............................-->
>
>
>
>
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