Re: [sdw] Noting that the Spatial data on the Web working group may not exist in a few months time... (#1436)

@ldesousa 
You probably mean the geo:inSRS property, which would connect a geo:Geometry to a CRS representation.
This was not meant to be defined on a geo:Feature level, as a geo:Feature might be linked to many geo:Geometry in different CRS.
However, we dismissed this for GeoSPARQL 1.1, with it being on the roadmap for the next revision.
For GeoSPARQL, we do not need and will not define what the CRS representation looks like. We only define a property that can link to a CRS representation described by a URI in RDF.

So, defining a CRS ontology is a different project altogether.

For me, I see the following steps to be done:

1. Finish the White Paper for OGC, which I linked previously
2. Review and possibly extend already existing approaches
    My favorite here would be to create a JSON-LD context for projjson (https://proj.org/en/9.3/specifications/projjson.html) since that would make every defined projjson CRS immediately compatible to the ontology model we create. (Unfinished Draft here: https://github.com/situx/proj4rdf/blob/main/projjsoncontext/projjsoncontext.json)
3. Take care of things not included in the WKT standard model, e.g., projections, interstellar coordinate systems, etc.
4. Find a place and people to publish it scientifically and officially

Involved in the proj4rdf work, I worked on all of the things as mentioned earlier. What is missing is a critical review of people, endorsement, and, eventually, a place to publish it.

So, if you are willing, I would be happy to move this forward.



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Received on Thursday, 30 November 2023 20:10:36 UTC