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。
The paper put in writer's suggestions about field work in survey and design of bridge site through the practice of it.
介绍了原图数字化、航测数字成图、地面数字测图的作业方法，探讨了测绘软件的选择，阐述了数字测图外业工作的实施方法及应注意的事项。
This paper states the software and hardware standard and precautions of digitized mapping from the aspects of digitized map, composing of digitized mapping and mapping software.
为保证数据采集的精度和点云数据三维建模的可靠性，给出了详细的包括外业和内业的工作流程。
To ensure the accuracy of the data capturing and the reliability of the three dimension modeling, the working procedure is given, which includes the field work and Lab.
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