通过使用背景地图文件，可大大简化绘图程序，并实现将高分辨率的地理信息添加到分析图中。
The drawing program has simplified and the detail geographic information has appended by using the map background file.
通过使用背景地图文件，可大大简化绘图程序，并实现将高分辨率的地理信息添加到分析图中。
The drawing program has simplified and the detail geographic information has appended by using the map background file.
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