OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world. OSM maps can be used and edited by anyone without copyright restrictions. Contributors add and update map data from sources like GPS tracks, free government data, and aerial imagery. The raw map data is freely available for any use. OSM aims to create a map that is more frequently updated than commercial options, which are often out of date and cannot be edited by users to fix errors.