摘要
基于栅格数据矢量化理论,给出了一种遥感分类图栅格数据的矢量化方法:把多边形分为简单多边形和复杂多边形分别进行处理,对于无包含关系的多边形,采用左转算法进行处理,对于有包含关系的多边形(包括含有共边"岛"的情况)采用多边形嵌套关系判断算法进行处理.利用该方法,能够较好地解决共边"岛"矢量化不理想的问题,在矢量化后共边"岛"能够形成较完整的拓扑关系,用该方法处理后得到的矢量图,基本上能够满足实际需要.
Based on the theory of vectorization of raster data, a method of vectorization of RS classified map has been put forward. First of all, the polygon is divided into simple polygons and complex polygons which are processed separately, then turn left algorithm is used to handle non-inclusion relation of the polygon and an algorithm to determine the relationship of polygon in polygon is used to identify the relationship of polygon in polygon （ including situation with sharing-boundary islands）. The method can better solve the unsatisfactory vectorization problem of sharing-boundary islands, and after vectorization of the sharing-boundary islands a more complete topology can be formed. After using this approach to vectorization, vectorgraph is basically able to meet the actual needs.
出处
《郑州轻工业学院学报（自然科学版）》
CAS
2009年第6期104-107,共4页
Journal of Zhengzhou University of Light Industry:Natural Science
关键词
遥感分类图
共边“岛”
矢量化
栅格数据
RS classified map
sharing-boundary islands
vectorization
raster data
