近年来,我院承担的大部分项目都因上马急,工期紧,深感与保证勘测设计质量形成十分尖锐的矛盾,随着铁路建设事业的发展,传统的勘测方法已经不能适应形势需要。为此于1982～1984年先后在朔石线和大秦线开展了一次较大规模的航测初测工作,两线共完成正线 In recent years, most of the projects undertaken by our hospital have been in acute and tight schedules. Most of the projects undertaken by our institute are deeply and contradictory to guarantee the quality of survey and design. With the development of railway construction, the traditional survey methods can no longer meet the needs of the situation. To this end in 1982 ~ 1984 successively in the stone line and the Daqin line conducted a large-scale preliminary test of aerial survey, the two completed a positive line