The paper put in writer's suggestions about field work in survey and design of bridge site through the practice of it.
本文通过作者对桥位测设的实践总结，就桥位测设外业工作的几个问题发表自己的看法。
Proceeding from the reality of work, this paper detected the accuracy of base map(DOM) in the second land survey of Jilin province, using the method of field measured checkpoints.
从工作实际出发，就吉林省第二次土地调查工作底图（DOM）的精度，通过外业实测检测点的方法，对其进行检测。
It is introduced that the CCD photograph law survey laser distant field facula principle of work in this article.
介绍了CCD摄像法测量激光远场光斑的工作原理。
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