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Wenli Li, W. Randolph Franklin, and Salles V. G. de Magalhães. Computing approximate horizons on a GPU. In 26th Fall Workshop on Computational Geometry. CUNY Graduate Center, New York, USA, 27-28 Oct 2016. (extended abstract).
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Abstract

We use an O(n log(n)) quadtree-forest algorithm to compute approximate horizons at all points of a DEM, and achieve more than 30 times speedup on a GPU. The result of the algorithm is very close to that of the brute-force algorithm.

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