Extras: OpenStreetMap

[zverok]

This is a huge project, which could be VERY helpful.
Parts include:

• Reality-aware reverse geocoding: Geo::Coord.new(..., ...).address having City, Country and other parts as a Reality::Entity;
• Reality-aware routing: E('Kharkiv').route_to('Kyiv', :auto)
  • ...with all intermediate objects being entities, allowing to do things like E('Kharkiv').route_to('Kyiv', :auto).map(&:city).map(&:population);
• Reality-aware search: E('Times Square').venues(:restaurant) (returning list of Reality::Entitiy also);
• Lists: E('Ukraine').roads.length.

Also clarification will be needed about entities which can be found ONLY on OSM, not Wikipedia/Wikidata.

Some thoughts on implementation:

• Wikidata has predicate "OSM relation" for many items;
• OSM has tag "wikipedia link" or something like that for relations.