基于DEM的泰森多边形计算

A Calculation Method of the Thiessen Based on DEM

在计算流域的面平均雨量时,泰森多边形法考虑到站点密度及其空间分布影响,计算精度较高。该文介绍了一种采用计算机语言程序来计算泰森多边形的方法,比传统几何制图方法更方便、快捷、可靠,在水文预报、水文分析计算和分布式水文模型中可广泛应用。

In calculating drainage basin surface average precipitation rain fall , the method of Thiessen polygon gives higher calcula-tion accuracy , which has considered the effect of Rainfall station density and spatial distribution .The paper introduces a method u-sing the computer program to calculate the Thiessen polygons , and it is more convenient , quickly and reliable compared with the tra-ditional geometric mapping method .So the method can be widely used in hydrological forecasting , hydrological analysis and compu-tation and distributed hydrological models .