中文摘要：

为解决现有屏幕饱和度计算模型浪费计算资源，计算结果与实际有时不符等问题，提出了一种基于区域划分的屏幕饱和度计算模型。该方法的主要步骤是：①针对空间目标进行自适应聚类，获取空间目标的疏密分布；②境界，高等级水系，高等级道路联合构建拓扑形成拓扑面，拓扑面与聚类结果进行叠置分析，形成待计算划分区域；③对划分区域分别进行屏幕饱和度计算。实践表明，该方法通过对划分后的可见小区域分别计算，有效弥补了原方法的缺陷。

英文摘要：

To solve the problems that the model of computing screen saturation wastes computing resource or the results do not conform to reality sometimes, a computing model based on region partition was proposed. The main steps of the method include： first, sparseness and denseness distribution are obtained by spatial objects adaptive clustering; second, boundary, high-grade water, high-grade roads were united to build topological area, then partition regions were formed by overlay analysis ; finally, the screen saturation of every partition region was computed. Practices indicated that this method could effectively offsets the problem inherent in conventional method.