以往隧道控制导线除根据需要,必须严密平差外,习惯上采取分别(简易)平差。即先按等权进行角平差,然后进行坐标调整。坐标的平差按传统方法,是将坐标闭合差按坐标增量绝对值比例分配到各边坐标增量。对于光电测距导线宜采取按边数平均分 In addition to the previous tunnel control wire as required, must be closely adjusted outside, customary to take the (simple) adjustment. That is, according to the first right angle adjustment, and then coordinate adjustment. Coordinate adjustment according to the traditional method, the coordinates of the difference is closed by the absolute value of the incremental coordinates assigned to each side of the incremental coordinates. For photoelectric distance measuring wire should be taken by the edge of the average score