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上海市兴建的磁悬浮快速列车工程 ,要求离地面 10多m高的轨道梁高程定位的精度为± 1mm ,如此高精度的要求采用精密的水准测量是难以实施的 ,故采用不量仪器高、棱镜高的三角高程测量来实现高程传递
The construction of maglev rapid trains in Shanghai requires that the elevation accuracy of the track beam with a height of more than 10 m above the ground be ± 1 mm. Such a high precision requires precise level measurement which is difficult to implement. Therefore, High triangular elevation measurement to achieve elevation transfer