OpenStreetMap

OpenStreetMap (OSM) is a community-built map and geographic database. Steve Coast started the project in the United Kingdom in 2004. Contributors add roads, trails, railways, buildings, services and other local features. The OpenStreetMap Foundation supports the project and runs its central website and servers.

A community project

Contributors use local knowledge, field surveys, GPS traces and aerial imagery to add and correct information. Its community includes volunteer mappers, GIS specialists, public agencies and humanitarian groups.

Editable map data

The database records places as points, lines and areas with tags describing each feature. A contributor can add a footpath, correct an address or map a station, keeping the shared map current.

Open data for reuse

The data is released under the Open Database License. People may use it in personal, public or commercial projects with attribution. Adapted databases may have share-alike requirements, so users should check the license.

Maps in everyday services

OSM data feeds websites, mobile apps and navigation devices. OpenStreetMap offers an online map and editing tools, while many routing and search features come from separate services built on its data.

Foundation and infrastructure

The Foundation is a non-distributing company limited by guarantee, registered in England and Wales, with an office in Cambridge. It maintains infrastructure, raises funds and organizes the State of the Map conference.