The Geonames Vocabulary (EKT Edition) is a collection of geographic terms curated by the EKT, a subset of the Geonames geographic database. It is hierarchical based on the administrative organization of each country, and each term includes alternative names and coordinates. It is primarily used to enrich the content aggregated in the SearchCulture.gr National Digital Cultural Content Aggregator. The vocabulary is continously updated and enriched with additional terms on its application.
http://semantics.gr/authorities/geonames-places-earth/253651
