Earthquake intensity mapped to OpenStreetMap data. Red corresponds to stronger shocks (source: USGS, OpenStreetMap contributors) – click for fullscreen.
The color of the features is determined by the interpolated peak ground acceleration at each location with red for the areas experiencing the strongest shocks. The northern region of Kathmandu had ground acceleration readings as high as 0.8 Gs; the ground was essentially falling in the wrong direction at the center of an area with 1 million residents and a population density higher than San Francisco.
You can use this data now for mapping. Here is an example of an area at the most violent epicenter of the earthquake that is in need of additional mapping.
High priority area: map data is in red, features are missing (source: USGS, OpenStreetMap contributors, DigitalGlobe) — fullscreen.