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。
Map scanning digitization is one of the ways to capture spatial data in GIS. After digitization, the geometrical figure and area of a figure may change because of errors.
地图扫描数字化是GIS数据采集的重要手段，地图上的图形经扫描数字化后，其几何形状和面积因误差的存在而发生改变。
Map scanning digitization is one of the ways to capture spatial data in GIS. After digitization, the geometrical figure and area of a figure may change because of errors.
地图扫描数字化是GIS数据采集的重要手段，地图上的图形经扫描数字化后，其几何形状和面积因误差的存在而发生改变。
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