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简述正倒镜分中法测设已知水平角的方法,并绘图说明。

问答题
2022-04-02 17:48
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正确答案
(1)在A点安置经纬仪,盘左照准B点置数L,顺时针转动使度盘读数为(L+β),沿视线方向定出P2点(1分);(2)盘右位置照准B点,测设β角定出P1点(1分);(3)最后取P1、P2两点连线的中点P,角BAP即为要测设的角度,AP方向线就是需要定出的方向(1分)。 绘图(2分)

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