闭合水准路线高差观测如图，已知A点高程HA = 41.200m，观测数据如图所示(环内单位为m的为两点高差，环外单位为km为两点距离)，计算B、C、D、E点的高程。 (1)计算高差闭合差：fh = ∑h = -0.024m = -24 mm (2)|fh|<|fh允| (3)计算改正后的高差的高程
答：分配闭合差，计算改正数∑L = 12km
v1 = - (L1/∑L) * fh = 2mm
v2 = - (L2/∑L) * fh = 6mm
v3 =- (L3/∑L) * fh = 4 mm
v4 =- (L4/∑L) * fh = 7mm
v5 =- (L5/∑L) * fh = 5mm
∑v=-fh(检核)
HB = HA+ h1 + v1 = 39.784m
HC = HB + h2 + v2 = 37.338m
HD = HC + h3 + v3 = 39.399m
HE= HD + h4 + v4 = 40.184m
HA= HE + h5 + v5=41.200m(检核)
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