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Thiessen polygon

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  1. [Euclidean geometry] Polygons generated from a set of sample points. Each Thiessen polygon defines an area of influence around its sample point, so that any location inside the polygon is closer to that point than any of the other sample points. Thiessen polygons are named for the American meteorologist Alfred H. Thiessen (1872–1931). Media/Thiessen-polygons.gif

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