所谓的地形图的比例尺就是在图上某一线段的长度与地面上相应线段的水平距离D之比。
该系统能处理任意边界、各种比例尺的地形图。
This system can process the topographic maps of arbitrary boundary and all kinds of scale.
传统的库容计算方法是在已有的地形图上采用求积仪法进行，当精度要求较高时，需到现场实测更大比例尺的地形图。
In traditional reservoir capacity calculation, a planimeter is used to obtain a reservoir capacity from topographic maps and large scale topographic maps are needed if high accuracy is required.
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