2016-10-07 20:34 GMT+02:00 Denny Vrandečić <vrandecic@gmail.com>:

Wikidata allows to set a coordinate system - it is called a globe or coordinate system - on every coordinate. This would be the natural place to specify whether it is WGS84 or GDA94 or another system. Most of them are Q2, which, as per data model, is indeed WGS84

Hi Denny,

can you be more specific about this? So when there is no explicit value in the globe parametre of GlobeCoordinate, then it is treated as Q2 (this corelates with the dumps and every RDF serialization)? It would imply geographic coordinates (not the same as WGS84!!). Or is it considered to be specifically WGS84, which is Q11902211?

And how you tell the coordinate system for other celestial bodies like Q111 (Mars) or Q2565 (Titan)?

Thanks a lot

Jan