LOSM: a SPARQL Endpoint to Query Open Street Map.

Geographical data is gaining momentum in scientific and industrial communities thanks to the high level and quality of information and knowledge it encodes. The most recent representation of the Linked Open Data cloud shows GeoNames competing with DBpedia as the largest and most linked dataset available in the Web. In the “normal” Web, Open Street Map (OSM) has reached, in the last years, a maturity stage thus allowing the users to exploit its data for a daily use. We developed LOSM (Linked Open Street Map), a SPARQL endpoint able to query the data available in OSM by an on-line translation form SPARQL syntax to a sequence of calls to the overpassAPI. The endpoint comes together with a Web interface useful to guide the user during the formulation of a query.