A fast multi-scale polygon features update approach based on features matching

In the process of vector polygon features update, one geographic entity in multi-scale maps are always expressed diversely, because the details and the key of the expression are different. That makes multi-scale polygon features update difficult. Some experiments are performed to establish the river polygon features´ relationships of multi-scale maps. The experiments not only have high efficiency, but also have the strong robustness, which prove the advantages of the algorithm in this paper.