The underwater topography survey is playing the important role in the inland river and in the coast engineering construction and the water depth survey precision is always paid key attention to.

水下地形测量在内河和沿海工程建设中发挥着重要作用，水深测量的精度也历来为人们所重点关注。

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With the engineering survey control network, authors made a high precision orientation, measuring and control to basement, mine gallery wall of CSR beam loop by polar coordinates with total station.

采取工程测量控制网，对冷却储存环“S”形束流环的基础、坑道墙，采用全站仪按极坐标法进行高精度定位、测控。

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