Nominatim uses OpenStreetMap data to find locations on Earth by name and address (geocoding). It can also do the reverse, find an address for any location on the planet.
Find places by name or adddress (Geocoding)
Nominatim can power the search box on your website, allowing your users to type free-form queries (“Cafe Paris, New York”) in any language. It also offers a structured query mode (“postcode=12345”, “city=London”, “type=cafe”) that helps you to automate geocoding of extensive address lists.
Look up addresses for a location (Reverse geocoding)
Given a latitude and longitude anywhere on the planet, Nominatim can find the nearest address. It can do the same for any OSM object given its ID.
Nominatim scales with your needs. Run a search service for your city on a laptop or set up a larger server with data of the whole planet.
You can decide which features of OpenStreetMap are important to you. Nominatim imports only what you tell it to.
Always up-to-date with OpenStreetMap
OpenStreetMap data is constantly improved by thousands of editors. Keep up to date with these changes through minutely updates.
Nominatim is the geocoding software that powers the official OSM site www.openstreetmap.org. It serves 30 million queries per day on a single server.