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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。从扫描数字化的基本原理和实施过程出发,以1∶500现有地形图为数据来源,利用测绘专业软件CASS7.0实现了地形图扫描数字化的整个生产过程;讨论了扫描数字化成图的主要误差来源,并对扫描数字化过程中的校正精度和矢量化精度进行了分析。 更多还原

【Abstract】 The topographic map scanning digitization is an important acquisition method for GIS data,which has become the mainstream of the map digitization.This article Introduced the scanning digitization’s basic principle and the implementation process and with 1:500 existing topographic map for data sources,using professional software CASS7.0 realized the whole production process of the map scanning digitization.It discussed the scanning digital mapping the main error sources and analysed the calibrati... 更多还原