In the days since the earthquake in Nepal,
thousands of humanitarian mappers have sprung into action to
fill in gaps in the map in the affected area. In addition to the 3960 previously mapped miles of roads and 182,706 buildings, more than 2000 mappers have recorded 13,199 new miles of roads and 110,681 new buildings.
In many post-disaster mapping cases there is little
existing map data in cities, but in this case Kathmandu was
already well mapped and the major challenge has been to
fill in surrounding rural areas. The animation above shows
the data that was present three days ago and
all the new work that has gone into mapping
thousands of miles of roads since then.