OpenStreetMap is an open-sourced mapping website, which is a website where anyone, anywhere can edit and add infrastructure, stores, traffic jams, and more. These different map layers can be taken off and on by an individual user depending on what they are looking for.
The article is specifically about the website in relation to humanitarian efforts like in Nepal. Mappers and volunteers can go onto OpenStreetMap and and use satellite images as well as previous information collected to identify helicopter landing zones, residential areas, and if the highway network is still intact. With this information, aid workers can the go into the area of crisis and more effectively and efficiently help those in need.
Link to the Full Article: http://opensource.com/life/15/5/nepal-earthquake-hfoss