Long distance river-crossing leveling is an important job in the elevation control of the long-span bridge construction.
长距离跨河水准测量是特大跨径桥梁建设中高程控制的一项重要内容。
This paper introduced the field selection, field planning, vane production, observation methods, and record format of river-crossing leveling in detail.
详细介绍了光学测微法跨江水准测量方法、场地选择、场地布设、砚板制作、观测方法、记录格式等内容。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values.
采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。
When completed river crossing leveling by means of trigonometric leveling with distance measurement, there are two types of observed values.
采用测距三角高程法进行跨河水准测量，可以不量取仪器高，但观测值中有两类不同的观测量。
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