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Light Detection And Ranging, a way to measure distance with a laser light, used to make high-resolution elevation maps. (At varying resolution but commonly at approximately 1 meter resolution (an elevation point every square meter) with +/-10 centimeter vertical resolution => much higher resolution than people were used to beforepreviously.)
A bare-earth DEM describes details of the Great Sand Dunes National Park and Preserve in Colorado. (Credit: USGS) (Source: Stoker, 2016)
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