作为空间信息系统核心的地图数据库系统
Cartographic Data Base System the Core Component of the Spatial Information System
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摘要: 文中先对空间数据的概念,它们的时空变化特点和管理上的复杂性作了介绍。然后就地图数据处理的拓扑变换性质以及在该地图数据库系统中称之为"间接拓扑选取"的实现进行了论述。Abstract: This paper firstly introduces the concept of spatial data, their particularities in the aspects of time/space changing and the complexities in their management. Then it describes the properties of topological transformation in map data processing as well as the realization of so-called indirect topological selection in this cartographical data base system.