[ssig] [vespa.activity] Solar System resources in the VO

[Baptiste Cecconi]

Hi Rob, 

yes I fully support this. 
I think some VESPA people are planning to attend (or I will make sure there are). 

Baptiste


> Le 12 févr. 2019 à 14:04, Rob Seaman <seaman at lpl.arizona.edu> a écrit :
> 
> Will anybody from IVOA attend the Planetary Data Workshop?
> 
>     https://www.hou.usra.edu/meetings/planetdata2019/ <https://www.hou.usra.edu/meetings/planetdata2019/>
> Both groups would benefit!
> 
> Rob
> 
> PS - if this reply is held for moderation, could somebody please add my LPL email to the SSIG?
> 
> Thanks!
> 
> --
> On 2/12/19 4:12 AM, Pierre Fernique wrote:
>> 
>> Dear Ssig, Apps and VESPA members
>> As you probably saw, we have more and more Solar System resources available in the VO.
>> This is a really good news (notably hanks to Europlanet effort)
>> But for client point of view, and notably Aladin, it is more and more difficult to display and use correctly these new resources as there is presently no standard way to specify the celestial body concerned by each of these resources. Actually, in Aladin, we are face to two issues :
>> 
>> How to build correctly the data discovery tree ? Concretely, how to move the good TAP, CS and other services to the Solar System branch ?
>> How to handle the incompatible projections (sky resources over planets, or the opposite, or Mars data over Io, etc...) ?
>> I progressed a little. For the first point, I made a very bad hack based on the ivoid. We're lucky, most solar system resources use EPN-core + DACHS server... and DACHS automatically uses an ivoid containing the substring "/epn". By magic, 35 resources are now placed in the Solar System branch. I also had to manually add 3 others resources ( jacobsuni/tap, pvol/tap and  vo-plasma.oeaw.ac.at/tap). The result is not bad (see below) but this method is clearly debatable. And there is no distinction between planets.
>> For the second point, I have not found a solution. Only Solar System HiPS maps have a dedicated keyword for each body. But  as it is not the case for other resources of the Solar System, I can not presently use this keyword.
>> 
>> So the question : How to characterize Solar System resources in the VO ? 
>> For the VO registry, do we have to invent a dedicated field such as <obsbody>mars</obsbody> ?
>> For TAP tables, how to specify that this table concerns this body, or the sky ?
>> How to handle the list of celestial bodies ? Do we have to provide a list (mercury, venus, earth, moon, mars, io,...) somewhere in the VO ?
>> Reactions ? Suggestions ? Do we have time to discuss this point during Paris Interop ?
>> Cheers
>> Pierre Fernique
>> 
>> <cgpjigkioblcbnll.png>
>> 

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