OpenStreetMap is a collaborative project to create a free editable map of the world. It uses geospatial data that is collected through contributions and made available under an open license. The project relies on various open source tools and technologies to render and serve map tiles, edit and upload geospatial data, and develop software applications using OpenStreetMap data. Contributors frequently gather at "mapping parties" to collect geospatial data using GPS devices and add or update information in OpenStreetMap.