该模型以地学图形数据库与属形数据文件关联共存的方式，解决了地图要素的计算机压缩存贮与分析处理问题。
The models solve the problems of computer compressing store and analysis and processing for map elements, with relationship and coexistence of geo graphics database and geo attribute data files.
拓扑处理是数据查询与分析的前提，矢量数据压缩则有利于节省存贮空间和提高数据处理速度，文中也讨论了电子地图制作系统中所采用的拓扑及数据压缩方法。
The topology processing is the prediction of the data searching and analysis, and the vector map data compressing is good for economizing memory space and speeding up the data processing.
拓扑处理是数据查询与分析的前提，矢量数据压缩则有利于节省存贮空间和提高数据处理速度，文中也讨论了电子地图制作系统中所采用的拓扑及数据压缩方法。
The topology processing is the prediction of the data searching and analysis, and the vector map data compressing is good for economizing memory space and speeding up the data processing.
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