Providing aid to those affected in the Philippines has been an incredibly difficult task since many of the roads and airports were wiped away by Typhoon Haiyan.
But a new map developed by NASA's Jet Propulsion Laboratory can pinpoint exactly what structures were damaged and where.
NASA compares satellite imagery before and after a disaster.
That info is so detailed that it can capture nuances like the texture of surfaces from space -- like a building's roof. If that "texture" changed after an event, that could indicate what's destroyed and what areas are still intact.
Frank Webb from NASA's Jet Propulsion Laboratory explains more.