LIDAR is a remote sensing technology that measures distance by illuminating a target with a laser and analyzing the reflected light. The term LIDAR comes from both the words light and radar. Lasers are used to develop highly detailed images of the surface of the earth. The picture above was taken in New York shortly after September 11th. The use of LIDAR was developed to help produce 3-D images so the crews can use the right cranes to help with the cleanup and rubble left behind. You can see from LIDAR where the big buildings are located and where the land is flat.
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