Re: Addition of new use case: Creation of “virtual observations” from “analysis” phase of weather prediction model

@Krzysztof - that's great news. Should be easy to meet my use case then :-)

Jeremy

On 23 March 2015 at 14:44, Krzysztof Janowicz <janowicz@ucsb.edu> wrote:

>  Hi Jeremy,
>
> just a minor note. SSN supports virtual observations.
>
> Best,
> Krzysztof
>
>
> On 03/23/2015 04:32 AM, Jeremy Tandy wrote:
>
> All - I have added another use case primarily of interest to
> SSN: [Creation of “virtual observations” from “analysis” phase of weather
> prediction model][1]. It revolves around the use of numerical simulations
> to create “virtual observations” rather than the
> “sensor-stimulus-observation” model which is at the heart of SSN.
>
>  I include the text of the Use Case below for reference:
> —
>  National Meteorological Services (NMS), such as Met Office
> <http://www.metoffice.gov.uk/>, maintain a network of weather observation
> sites within their region of responsibility in order, amongst other things,
> to provide input to their numerical weather prediction models. The cost of
> maintaining these weather observation sites means that their number is
> limited.
> Within the UK, and likely in other places too, there is a high demand for
> weather observations for specific locations. To meet this demand, the Met
> Office provides data for many more locations than the number of weather
> observation sites they maintain. In order to do this, “virtual
> observations” for these locations are derived from the “analysis” of the
> numerical weather prediction model. (“Analysis” is the term used to
> describe the initial state of the numerically modelled atmosphere from
> which the forecast is calculated; it incorporates real observations and
> provides a dynamically balanced representation of the atmosphere at a
> snapshot in time.)
> The metadata needed to provide context to a “virtual observation" is
> identical to that for normal observations; albeit that the procedure used
> to create the observation involves a computational simulation rather than a
> physical sensor and stimulus. Clearly, it is important to provide
> information about the procedure used to create the observation so that
> “real” observations can be distinguished from “virtual” observations.
> The Observations and Measurements (O&M, ISO 19156) is sufficiently
> flexible enough to accommodate use of a computational simulation for the
> observation procedure. However, the Semantic Sensor Network model is
> (appears to be?) rooted in the “sensor-stimulus-observation” model and, as
> such, does not seem to be applicable to cases such as “virtual
> observations”.
>  —
>
>  Jeremy
>
>  [1]:
> https://www.w3.org/2015/spatial/wiki/Working_Use_Cases#Creation_of_.E2.80.9Cvirtual_observations.E2.80.9D_from_.E2.80.9Canalysis.E2.80.9D_phase_of_weather_prediction_model_.28primarily_SSN.3B_also_Best_Practice_.26_Time_.29
>
>
>
> --
> Krzysztof Janowicz
>
> Geography Department, University of California, Santa Barbara
> 4830 Ellison Hall, Santa Barbara, CA 93106-4060
>
> Email: jano@geog.ucsb.edu
> Webpage: http://geog.ucsb.edu/~jano/
> Semantic Web Journal: http://www.semantic-web-journal.net
>
>