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.
然而，不同决策层需要不同比例尺的土地利用图，这样就很有必要对大比例尺土地利用图进行制图综合。
However, different levels of decision-making managers need different scales of land use map, so it's necessary to perform map generalization on large scale land use map.
综合信息矿产预测系统是一个可用于大比例尺矿产靶区定量预测的智能化地理信息系统，因而应用在危机矿山上更有实效。
The comprehensive information system for mineral resources prediction is a quantitive prediction aptitude GIS of large scale mineral resources targets, which is suitable for the crisis mines.
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