[Seavox] "Sea Areas"

[olivier lauret]

Dear Roy,

Sorry for the delay, I'm back to my office after vacation. Completely agree with your plan, especially about your project of spatial database working with OGC webservices! I have a few comments that I'd like to live to your assessment:

- Areas such as Pacific Ocean and Atlantic Ocean are not provided; the fact is that it is important for ocean models and remote sensing data sets to have them as keywords. In other words I wish the ontology allowed a relationship like : 

World >> Pacific Ocean >> North Pacific Ocean >> ..
      >> Pacific Ocean >> South Pacific Ocean >> ..

- Still in the same field of view, ie about "remote sensing and model world". In these communities people use to speak about 'global' coverage versus a given area, for ex Mediterranean Sea. As 'global' is not properly an area but more a space scale, that means "worldwide" but not only, how do Seadatanet can deal with such important questions? 
Here at CLS we choosed to introduce a vocabulary keyword about those scales. If the keyword value is 'global' then nothing about geographic areas names. If the keyword value is 'regional' then it is mandatory to mention which one is the geographic area concerned, following Seavox. That's a possibility, but there must be something better to do.
I remember we already talk about that, but I am not sure of the status of this discussion?

What is your opinion on that?

Thanks!

Olivier.


-----Message d'origine-----
De : seavox-bounces at biwebs1.nerc-liv.ac.uk [mailto:seavox-bounces at biwebs1.nerc-liv.ac.uk] De la part de Roy Lowry
Envoyé : vendredi 10 octobre 2008 17:40
À : seavox at biwebs1-2.nerc-liv.ac.uk
Objet : [Seavox] "Sea Areas"

Dear All,

Attached is a concept map of a proposed nucleus list of "Sea Areas" (defined something like named subsets of the Earth's surface of interest to the oceanographic data management domain for use as data discovery keywords).  Consequently, it includes chunks of land to provide context for inland waters that are increasingly falling into the oceanographic data centre sphere of interest).

The terms included come from four sources as indicated by the bubble colour.  The pale blue terms bear a striking resemblance to the unpublished IHO 2002 S23 revision.  The red/orange terms are the so-called ROSCOP extensions to C23.  The green terms are terms I've added to cover, with geographical context, freshwater bodies  that have been brought to my attention as being of interest to 'oceanographic data centres'.  The purple term is the cause of all the controversy in IHO and the reason why S23 hasn't been revised since 1953.

The terms are organised into an ontology that may be navigated by starting at 'World' then following the arrows.

My plan would be to implement these terms as a single list in the vocabulary server with the relationships between terms as shown by the arrows.  Further terms may be added as required, providing they are proposed together with the terms to which they should be mapped (ie broader areas that enclose the new term or overlap with it).  This new list would replace the existing C16 vocabulary used in SeaDataNet. Naturally mappings to the new list would be provided wherever possible.

However, I plan to go further than this and set up a spatial database holding a polygon corresponding to each term that would be accessible through WFS and/or WMS.  Service URLs would be included in the term definition field.

Initially, I would like the governance group to consider the following questions:

(1) Are there any reasons why this plan shouldn't go ahead?
(2) Should 'Sea of Japan' be included as a term under SeaVoX governance?
(3) Should we stick with the local spellings such Jawa Sea and Tai-Wan Strait?  If not, which terms should we change?

Any other comments on the terms included would be welcome.  

Note that I would rather avoid requests for additional terms at this stage until I get something together.  

The concept map is also available in CMAP XML export format if anyone needs it.

Cheers, Roy.



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