Thursday, April 14, 2011

Digital Elevation Model (DEM)

Digital Elevation Model- a digital model of elevation or altitude that can be represented by regularly or irregularly spaced point height values. 




A digital elevation model represents ground surface or topography. It is computer-created from data that are plotted on a map and then filled in to create a 3-dimensional map. Digital elevation models can be tilted and rotated to make each feature more accessible and to aid viewing of the overall area. This map is a digital elevation model of a part of Lesotho, in southern Africa. Red is the highest elevation and dark blue is the lowest. 

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