设测站O点高程HO=37.32m,仪器高i=1.45m,盘左望远镜上仰时读数小于水平时读数90°,采用视距测量方法,测得测站O至目标A的视距Kl=38.5m,中丝读数v=1.47m,盘左竖盘读数L=81°45′.1．求O至A的水平距离（

Question

设测站O点高程HO=37.32m,仪器高i=1.45m,盘左望远镜上仰时读数小于水平时读数90°,采用视距测量方法,测得测站O至目标A的视距Kl=38.5m,中丝读数v=1.47m,盘左竖盘读数L=81°45′.
1．求O至A的水平距离（精确到0.1m）
答：DOA =
2．求A点高程（精确到0.01m）.
答：HA =

Answer 1

水平距离=38.5-38.5*sin81.45
ha=37.32+1.45+（38.5-cos81.45*38.5）-1.47