一种利用格网叠置分析的居民地形状匹配方法

形状是居民地要素最基本的几何特征之一,也是居民地匹配的重要依据。针对现有居民地形状度量方法无法度量非1∶1对应情况形状相似性的问题,首先对待度量居民地实体(群)组合进行方向、位置、大小一致化处理;然后借鉴规则格网索引的思想,对组合建立适合的规则格网并赋予网眼不同的重要性系数;再分析待度量实体(群)内部、边界之间在格网中叠置情况差异性,将其作为两实体(群)的形状差异性,最终获得形状相似性值。将形状相似性与空间位置、面积的相似性通过加权平均获得综合相似性值,作为居民地匹配的依据。利用该形状匹配方法对居民地实体进行匹配实验表明,文中所提方法能够有效进行居民地实体的匹配。

Settlement Shape Matching Method Based on Grid Overlay Analysis

As a key geometric characteristic of areal settlement, shape is an important basis of settlement matching. The settlement shape of non 1∶1 matched situation is not fully measuring in existing methods. To solve these prob-lems, first of all, the direction, location, size of settlement entity( entity group) were consistency processed. Sec-ondly, appropriate rules grid were established, and the importance of different coefficient of mesh were given. Thirdly, the difference of the overlapping grid situation was measured, and as the shape differences. Finally, the similarity of location, area were combined to obtain comprehensive similar values, and the matching was fulfilled. The feasibility and accuracy of the shape matching method are verified by the experiments.