LIDAR (Light Detection and Ranging) is a remote sensing system used to collect topographic data. It is being used by NOAA and NASA to show topographic changes along the coastline. This map shows a LIDAR map after a landslide in Daly City, California in January 2007. I found this map at http://soundwaves.usgs.gov/2007/06/LidarExampleLG.jpg
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