Monday, June 20, 2011

Digital Elevation Model

A Digital Elevation Model is a three dimensional representation of a terrain's surface, digitally.  DEM's are often used for space models such as Earth, moons, or other planets, to show what their terrain looks like.  The example here shows us a digital elevation model of the terrain of Mt St Helens after the eruption in May of 1980.  You can see the entire top of the volcano was blown away from the blast.

mt st helens before and after

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