水准尺
Conventional method is that using level together with leveling rod, or utilizing Global Positioning System combined with leveling rod to pass the absolute elevation reading from on land control points to points underwater.
传统的测量方法是使用水准仪或GPS配合尺杆将绝对高程值由陆域高程控制点传递到水下待测点。
The working strength of the survey person can be reduced, and the idea burden of the perpendicularity of the manual control leveling rod can be relieved.
减轻了测量人员的工作强度,解除了人为控制水准尺垂直的思想负担。
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