Abstract:

Feature links of spatial data among serial scales are the milestone for data updating. How to construct and maintain these links becomes one of the kernel aspects of multi-scale data propagating updating process. After deeply studying the researches of domestic and overseas, a multi-scale spatial data linking tree is proposed after achieving the corresponding relation between neighbor scale data. Link between the same object lied in two data layers is expressed in the form of multi-scale index. And the data gap of the tree is optimized by using of virtual-link. The propagating route and mode is observed and investigated through the example of updating action such as new, update and delete etc. Test illustrated that multi-scale spatial data linking tree can steadily steer propagating process through correctly constructing and maintaining the links between neighbor scale date.

Key words: serial scales, link, settlement, propagating updating, map generalization