在毛主席“开发矿业”的伟大号召指引下,煤炭工业突飞猛进的不断发展。作为矿山“眼睛”的矿山测绘工作必须准确、及时地提出各种工程测绘图纸资料,而且要求速度快、质量高。以往我们只是用缩放尺拉,三角板推和比例规卡。这样工效低而质量差。尤其是缩放地形图时, Under the great call of Chairman Mao’s “mining development”, the continuous development of the coal industry has been by leaps and bounds. As mine “eyes” of the mine mapping work must be accurate and timely manner to put forward a variety of engineering mapping drawings and materials, but also requires fast, high quality. In the past we just use the zoom scale, triangle push and scale cards. This low efficiency and poor quality. Especially when scaling topographic maps,