Light detection and ranging (lidar) point cloud data were used to generate digital elevation models (DEMs) of Mount St. Helens. The high resolution and increased vertical accuracy lidar DEMs are incorporated into the National Elevation Dataset, the elevation layer of The National Map, and are important for studying debris flows surrounding the volcano. The 3D animation of the dome was developed by the U.S. Geological Survey, Earth Resources Observation and Science Center, Topographic Science, and is available online at http://topotools.cr.usgs.gov/
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