Keywords: Nepalese Earthquake, OpenStreetMap, sensors
Citizen science includes networks of ordinary people acting as sensors, observing and recording information for science. The Humanitarian OpenStreetMap Team (HOT) is one such sensor network working to empower citizens to collaboratively produce a global picture from free geographic information. The success of such open source software is extended by the development of freely used open databases for the user community. Participating citizens do not require a high level of skill. Final results are processed by professionals following quality assurance protocols before map information is released.