| 释义 |
Thiessen, n. Geogr. and Math.|ˈθiːs(ə)n|
The name of Alfred Henry Thiessen (1872–1956), U.S. meteorologist, used attrib. to designate various concepts relating to his method of analysing spatial distributions, esp. as Thiessen polygon, each of the polygons constructed around a set of points by drawing the perpendicular bisectors of the lines between each point and its neighbours, which have the property that every location in the polygon constructed around a particular point is nearer to it than to any other such point.
1923R. E. Horton in Monthly Weather Rev. (U.S.) LI. 349/1 The true average rainfall was assumed to equal the arithmetic means of all the records. This was checked by the Thiessen method. 1949Wisler & Brater Hydrology iv. 86 Thiessen mean, in the application of this method, adjacent stations are joined by straight lines... Perpendicular bisectors are erected on each of these lines thereby forming a series of polygons, each containing one and only one rainfall station. 1973D. Rhynsberger in Geogr. Analysis V. ii. 133 (heading) Analytic delineation of Thiessen polygons. 1983Sci. Amer. Nov. 132/2 If one draws lines midway between the monuments to divide the landscape into separate units (a process geographers call forming Thiessen polygons), one finds that with few exceptions the landscape is divided into roughly equal productive units. 1984Rocky Mountain Jrnl. Math. XIV. i. 123 Thiessen regions are also referred to in the literature as tiles and polygons, and have been associated with the names Dirichlet and Voronoi. |