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TOPOGRAPHICAL FEATURE REPRESENTATION BY OPENNESS MAPS
Yokoyama, Ryuzo,Shirasawa, Michio,Kikuchi, Yuu 대한원격탐사학회 2000 International Symposium on Remote Sensing Vol.16 No.1
Two concepts of overground openness and underground openness within a distance L are defined to a grid point on a digital elevation model (DEM). The farmer is a measure of sky extent over the point, and the later is of earth extent under. Those openness maps effectively represent convex and concave features of topography, and are conveniently applied to geomorphological and geological interpretation.