Image Analysis
Image Analysis
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Analysis of Photographs and Other Images for Monitoring Purposes
Multiple types of camera images are used to monitor volcanic activity at Mount St. Helens including ground-based digital photographs, aerial photographs, and webcam images.
Using Digital Elevation Models (DEMs) to Map Changes in Topography
At Mount St. Helens, scientists use Digital Elevation Models (DEMs) to monitor changes to topography around the volcano. For instance, overlapping DEMs are used to calculate the volume of lava erupted and the rate of dome growth, volume and growth of Crater Glacier, measure debris flow thickness, study sediment transport in streams and rivers, and monitor changes to stream chan