So what is the license of this combined database and is this combined database a whole database or a collective database? Note that Wikidata is under CC0 while OSM is under ODbL.
On Sat, May 13, 2017 at 12:03 AM, Yuri Astrakhan <yuriastrak...@gmail.com> wrote: > TLDR: A SPARQL (rdf) database with both OSM and Wikidata data is up for > testing. Allows massive cross-referenced queries between two datasets. The > service is a test, and needs a permanent home to stay alive. > > Overpass Turbo is awesome, but sadly it does not have data from Wikidata, > nor does it support some SQL-like conditions. I have setup a temporary RDF > database that has both OSM & Wikidata. You can use SPARQL queries to find: > > * All OSM objects with wikidata tag that references a Wikipedia > disambiguation page. Get the name of the page in first available language > ru, fr, de, en. http://tinyurl.com/mzlfb26 > > * OSM relations with wikidata tag pointing to a person (also tries > multiple language fallbacks). http://tinyurl.com/m6fh3wx > > * OSM relations with duplicate Wikidata IDs http://tinyurl.com/mvhhogx > > > == OSM data structure == > osmnode, osmway, osmrel - OSM object prefix, e.g. osmnode:1234 > osmt - tag, e.g. osmt:name:en (only has tags with latin chars, -, _, :, > digits > osmm - meta data about the object -- type, isClosed, version. > > I try to preserve OSM data without much changes. Every tag's value is > stored as a string, except for wikidata and wikipedia tags which are > converted to a URL, the same format as stored in Wikidata. > > osmway:29453885 > osmt:name "Samina"; > osmt:waterway "river"; > osmt:wikidata wd:Q156065; > osmt:wikipedia <https://de.wikipedia.org/wiki/Samina>; > osmm:type "w"; #### could be "r", "w", and "n" > osmm:isClosed false; #### this meta property is only for OSM ways > osmm:version 24. > > Wikidata data structure is identical to https://query.wikidata.org (see > help) > > > == Current limitations == > * Only includes OSM objects with either "wikidata" or "wikipedia" tags > * The OSM data only contains tags with only Latin letters, digits and > symbols - : _ > * OSM geometry info is not imported, e.g. no center point or bounding box, > except for osmm:isClosed (true/false) property for ways. > * Does not include OSM object inheritance data - e.g. cannot query for > "find a node that is part of a way which is part of a relation that has > wikidata tag that ..." > * Wikidata is updated every second, but OSM does not yet update at all, > imported from a full db dump as of a few days ago. > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk > >
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