# Sources

Every source used by the data, its licence and when it was retrieved. Update the date whenever a city is re-pulled.

| Source | Used for | Licence | Retrieved |
|---|---|---|---|
| OpenStreetMap (Overpass) | OSM ids, coordinates, cross-check of Wikidata coordinates | ODbL | 2026-11-07 (Kyoto) |
| Wikidata (Query Service) | Candidates, names, designation, sitelinks, coordinates | CC0 | 2026-11-07 (Kyoto) |
| Geospatial Information Authority of Japan map | Second-source coordinate check | _confirm terms before use_ | _not yet used_ |
| Blog sites | Post links | Author's rights | _not yet collected_ |

Operator and official tourism pages used for `data/intercity.json` are recorded per option in that file's `source` field.