Christopher added a comment.
Please see geoSPARQL CRS design is debatable <https://www.w3.org/2015/spatial/wiki/Coordinate_Reference_Systems#GeoSPARQL> from the W3C Coordinate Reference System website. Also, #7 here: the conflation of CRS with with the WKT in a literal has many undesirable effects <https://lists.w3.org/Archives/Public/public-locadd/2013Dec/0052.html> From the 12-063r5 document: The WKT representation of coordinate reference systems as defined in ISO 19125-1:2004 and OGC specification 01-009 is inconsistent with the terminology and technical provisions of ISO 19111:2007 and OGC Abstract Specification topic 2 (08-015r2), “Geographic information – Spatial referencing by coordinates”. Is this clear? They are admitting that the previous design form of WKT is **inconsistent** with other specifications. While it says nothing directly about the geoSPARQL specification, from page 4 of that 2012 design spec, WKT is defined through direct reference to the //deprecated standard//: "as it is specified in Well Known Text (as defined by Simple Features or ISO 19125)" What is outlined in this new specification is a de facto "WKT string form". And this form should accommodate all of the semantics of the geo:wktLiteral string format, including geometries (that are not explicitly mentioned in the new specification). Admittedly, this is quite a difficult thing to sort out, and there is definitely politics and big money at work in the standards process. If you want something more concrete to build on, maybe I ask them for a concrete geoSPARQL "best practice guideline". Finally, I do not feel that it is accurate to use a Wikidata entity (e.g. Mars) as a CRS by the design definition of geo:wktLiteral and then not properly specify it. It is probably better to just omit it and use a different data type for non-earth coordinates than to provide an entity concept URI as a CRS identifier. TASK DETAIL https://phabricator.wikimedia.org/T129072 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Christopher Cc: Smalyshev, Christopher, Aklapper, debt, Gehel, D3r1ck01, FloNight, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Deskana, Manybubbles, Mbch331 _______________________________________________ Wikidata-bugs mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs
