The topographic map scanning digitization is an important acquisition method for GIS data, which has become the mainstream of the map digitization.
地形图扫描数字化为GIS数据源的一种重要获取手段，已经成为地图数字化的主流。
According to the user's requirements for map digitization and data structure, this paper designs a "polygon-chain" combined sampling method and a sampling program.
本文从用户对地图数字化采样工艺和数据结构的需求出发，设计了“图斑——链”综合采样方法，并编写了与之相应的程序。
Maps as being the most fundamental and essential data sources of database as well as GIS and RS, data precision of map digitization has become a matter of common interest to all related disciplines.
地图作为地图数据库、地理信息系统、遥感等最基础和最重要的数据源，其精度问题已成为各学科共同关注的问题。
At present, the main ways to obtain DEM are: ground measurements method, the paper map digitization method, space-sensors based methods and digital photographic methods.
目前获取DEM的主要方式有：地面测量方法、现有地图数字化法、基于空间传感器法及数字摄影测量法。
At present, the main ways to obtain DEM are: ground measurements method, the paper map digitization method, space-sensors based methods and digital photographic methods.
目前获取DEM的主要方式有：地面测量方法、现有地图数字化法、基于空间传感器法及数字摄影测量法。
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