The establishment method of independent control network for extra-long tunnel in highway is introduced in this paper in detail.The impact of projection distortion on the accuracy of control point is reduced by changing the central meridian or projection plane.And the"one point,one direction"adjustment method is used to improve the accuracy within the control network.It is analyzed and explained for the practicality and efficiency of the proposed method in combination with the actual project situation.
关键词
特长隧道/独立控制网/投影变形/"一点一方向"
Key words
extra-long tunnel/independent control network/projection distortion/"one point,one direction"
维普
万方数据