1、答案:2. 计算表中水准测量观测高差及点高程。测站点号水准尺读数(m)高差(m)高程(m)备注后视前视BM.A1.8740.95522.718已知TP.10.91923.6731.7270.632TP.21.09524.3051.186-0.637TP.31.82323.6681.7120.096B1.61623.764计算检核6.4995.453a-b=1.046h=1.0463. 完成表中水平角观测的各项计算。目标度盘读数半测回角值一测回角值各测回平均角值盘左盘右 A0 00 24180 00 5458 48 3058 48 2758 48 3358 48 54238 49 1858 48
2、 2490 00 12 270 00 3658 48 3658 48 39148 48 48328 49 1858 48 424. 某直线段丈量了4次,其结果为:,。计算其算术平均值、观测值中误差及其算术平均值中误差和相对误差。(1)、算数平均数:(98.427+98.415+98.430+98.426)/4=98.424598.425 (2)、观测值中误差:m= b1=98.4245-98.427=-0.0025 b2=98.4245-98.415=0.0095 b3=98.4245-98.43=-0.0055 b4=98.4245-98.426=0.0015 代入公式计算得:m=0.0066(3)、算数平均值中误差:n=m/=0.0066/2=0.0033(4)、相对误差=n/98.4245=0.0033/98.4245=1/298151/30000