RE: satellite data as sensor data

A 2010 study by Andrew Woolf, Clemens Portele and myself [1] took a broad look at harmonization of the feature, observation, and coverage viewpoints. This provides a basis for understanding the issue you refer to in terms of the ISO/OGC modelling framework.

Some of the results of this analysis were reflected up into the recent revision of ISO 19109 [2] - specifically

-          'coverage' recognized as a valid representation of a property of a feature, where the property varies within the scope of the feature

-          'observation' recognized as one instantiation of the value-assignment meta-class

If your institution's library does not subscribe to ISO standards, the UML model for 19109.2 is available from the ISO Harmonized Model repository, hosted by JRC [3] - look in Drafts/ISO 19109. Also see diagrams below.

[1] http://www.thegigasforum.eu/cgi-bin/download.pl?f=545.pdf
[2] http://www.iso.org/iso/catalogue_detail.htm?csnumber=59193
[3] https://inspire-twg.jrc.it/svn/iso

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From: Kerry.Taylor@csiro.au [mailto:Kerry.Taylor@csiro.au]
Sent: Saturday, 30 May 2015 10:13 PM
To: frans.knibbe@geodan.nl
Cc: allaves@fi.upm.es; public-sdw-wg@w3.org
Subject: [ExternalEmail] Re: satellite data as sensor data

Ideally, I would expect SSN  to be used to describe a sensor ( and satellite) associated with remotely sensed data, but something else, ie the "coverage"  deliverable, to describe the data , and these would fit neatly together( ie modular).

For this reason, I agree entirely with your suggestions, Frans. I prefer "earth obs...data" over the alternative, but I am not fussy. And it should go in ssn too( although this is more motivated  by my sense of the right solution then it is by any solution-independent notion of requirements) .

Kerry


On 30 May 2015, at 3:16 am, "Frans Knibbe" <frans.knibbe@geodan.nl<mailto:frans.knibbe@geodan.nl>> wrote:
Hi Alejandro,

About the SSN-like representation<http://w3c.github.io/sdw/UseCases/SDWUseCasesAndRequirements.html#SSNLikeRepresentation> requirement ("It should be possible to represent satellite data using the SSN model, including sensor descriptions."):


  *   Can we change the title to something more descriptive like "Earth observation data as sensor data" or "Satellites as sensors"?
  *   It seems this requirement applies to the SSN deliverable too. Shall we add it?
  *   Would it be possible to explain why this would be desirable, in general? (This is one of the examples where I find it hard to refrain from thinking from the Linked Data paradigm, where models/semantics are modular and can be mixed at will)
Regards,
Frans

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