OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world.
Free • Open Source
What is OpenStreetMap?
OpenStreetMap is a project aimed squarely at creating and providing free geographic data such as street maps to anyone who wants them. It is a free editable map of the whole world. It is made by people like you. It allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth.