Right now all coordinates are represented in simple data as geo:wktLiteral. However, it may make sense to distinguish Earth coordinates (most frequent use case) from Moon, Mars and other globe coordinates, so that something like "100 miles around the White House" would not return objects on the Moon. I don't know yet how to represent it in a way that would both fit the simple value and be clear, maybe using different data types or some different syntax than WKT.
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Details
| Project | Branch | Lines +/- | Subject | |
|---|---|---|---|---|
| mediawiki/extensions/Wikibase | master | +46 -17 | Add syntax to distinguish non-earth coordinates |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Open | None | T88728 Improve Wikimedia dumping infrastructure | |||
| Open | None | T88991 improve Wikidata dumps [tracking] | |||
| Open | None | T46581 Partial dumps | |||
| Resolved | Smalyshev | T46580 Script for creating RDF dumps of all entities | |||
| Duplicate | None | T211495 Dump(s) of Wikidata classes | |||
| Duplicate | None | T211497 Dump(s) of Wikidata instances of Q5 | |||
| Open | None | T162351 Create a "page prop" RDF dump for Wikidata entities ("pagePropertiesRdf") | |||
| Open | None | T98320 [Task] Create dump of entity redirects (JSON or n-triples) | |||
| Open | None | T285307 Create randomly split partial entity dumps | |||
| Open | None | T44063 [Epic] Provide a plain linked data interface for accessing entities | |||
| Resolved | hoo | T101837 [Story] switch default rdf format to full (include statements) | |||
| Open | None | T50143 Implement complete RDF mapping for entities (tracking) | |||
| Resolved | Smalyshev | T123565 [EPIC] Support geo-coordinate search for WDQS | |||
| Resolved | Smalyshev | T93453 Create distinction between coordinates on Earth and others |
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Maybe using the syntax described here: https://en.wikipedia.org/wiki/Well-known_text#Variations
SRID=4326;POINT(-44.3 60.1)
That of course depends on having proper SRIDs somewhere...
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OGC GeoSparql defnition here: http://www.opengeospatial.org/standards/geosparql specifies the following format for coordinate system:
"<http://www.opengis.net/def/crs/EPSG/0/4326> Point(33.95 -83.38)"^^<http://www.opengis.net/ont/geosparql#wktLiteral>
Not sure though if all parsers could handle that, but if we put it only on non-Earth objects, which we don't have too many (just under 3000) that could work.
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Change 265119 had a related patch set uploaded (by Smalyshev):
Add syntax to distinguish non-earth coordinates