Humanitarian OpenStreetMap Team: Website

Free, collaborative maps are uniquely valuable to humanitarian work, especially in places where base map data is often scarce, out of date, or rapidly changing. OpenStreetMap is a project to create a free and open map of the entire world, built entirely by volunteers surveying with GPS, digitizing aerial imagery, and collecting and liberating existing public sources of geographic data. The information in OpenStreetMap can fill in the gaps in base map data to assist in responses to disasters and crisis.