GIS中矢量多边形网格化问题研究

在实际的GIS空间分析过程中，为了更加简便快捷的实现某些特定的空间分析功能，常常需要将不规则的矢量多边形区域转化为规则的格网区域。该文介绍了矢量多边形网格化的四类算法：中心点归属法、面积占优法、重要性法和面积内插法。其中面积内插法又可分为面积权重内插法、基于表面模型的面积内插法和基于统计模型的面积内插法。同时介绍了各类算法的实现思想，并比较了其优劣及应用范围，认为基于表面模型的面积内插法是一种比较理想且极具发展前景的矢量多边形网格化方法。

Study on the Gridding of Vector Polygon in GIS

For the sake of realizing some special functions in spatial analysis of GIS, it is necessary to covert irregular vector polygon into regular grid. This paper introduces four kinds of algorithms that have been used in this field, such as Central Point Method, Preponderant Area Method, Weightiness Method and Areal Interpolation Method. Areal Interpolation Method also includes three kinds of algorithms: Areal Weighting Interpolation Algorithm, Areal Interpolation Algorithm based on surface models and Areal Interpolation Algorithm based on statistical models. This paper compares the advantages and disadvantages of each method, and considers that Areal Interpolation Algorithm based on surface models is an appropriate method to the gridding of vector polygon and should be used more extensively.