现测量了AB和CD两段距离,得DAB=125.34m,DBA=125.29m,DCD=236.56m,DDC=236.61m,求哪段距离测量的精度高?
参考答案:
D`AB=1/2(125.29+125.34)=125.32m
DCD`=1/2(236.56+236.61)=236.59m
KAB=(│△D│/DAB)=(│125.34-125.29│/125.32)=(0.05/125.32)=(1/2506)
KCD=(│236.56-236.61│/236.59)=(0.05/236.59)=(1/4732)
KABKCD
答:AB段精度高。