Hello Olaf, this is a simple one. As it is common in natural language to present the world coordinates in order of [latitude, longitude], WKT standard <https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry>, which is used to represent coordinates in the SPARQL endpoint, on the other hand, expects an order of [x, y], which in this case means [longitude, latitude]. For more info, see https://en.wikipedia.org/wiki/OGC_GeoSPARQL and https://stackoverflow.com/questions/18636564/lat-long-or-long-lat
So it is a desired behaviour, not a bug ;-) Best regards, Jan On Mon, 2 Sep 2019 at 12:06, Olaf Simons <[email protected]> wrote: > I am trying to synchronise FactGrid data with Wikidata. > > A strange question: If I run a SPARQL search such as this one: > > > https://query.wikidata.org/#SELECT%20%3FGemeinde_in_Deutschland%20%3FGemeinde_in_DeutschlandLabel%20%3Fgeographische_Koordinaten%20WHERE%20%7B%0A%20%20SERVICE%20wikibase%3Alabel%20%7B%20bd%3AserviceParam%20wikibase%3Alanguage%20%22%5BAUTO_LANGUAGE%5D%2Cen%22.%20%7D%0A%20%20%3FGemeinde_in_Deutschland%20wdt%3AP31%20wd%3AQ262166.%0A%20%20OPTIONAL%20%7B%20%3FGemeinde_in_Deutschland%20wdt%3AP625%20%3Fgeographische_Koordinaten.%20%7D%0A%7D > > I get the coordinates with what looks like swapped values: > > "Point(10.7183 50.9489)" on the QueryService table output > "50°56'56"N, 10°43'6"E" on P625 at the respective Wikidata Item Q6986 > > any idea why this is so? > > Best, > Olaf > > > > > Dr. Olaf Simons > Forschungszentrum Gotha der Universität Erfurt > Schloss Friedenstein, Pagenhaus > 99867 Gotha > > Büro: +49-361-737-1722 > Mobil: +49-179-5196880 > > Privat: Hauptmarkt 17b/ 99867 Gotha > > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata >
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