点号11观测角(左角)改正数C改正角坐标方位角(°′″)(″)(°′″)(°′″)2345157 41 45距离(m)684.57109.8574.17116.2070.7192.65增量计算改正后增量ΔX(m)ΔY(m)ΔX(m)ΔY(m)78910-3-78.24-4-96.80-3+24.96-5+109.85-3+65.47-4-25.02-1+32.10-1+51.93-1+69.84-1-37.900-26.71-1-89.21-78.27-96.84+24.93+109.80+65.44-25.06+32.09坐标值X(m)Y(m)1112200.00121.73200.00232.09284.01353.84315.93289.22200.00点号13123456122345612总和174 05 3098 32 4590 37 45176 50 3096 31 3083 21 45719 59 45+2+3+2+3+3+2+15174 05 32151 47 1798 32 4870 20 0590 37 47340 57 52176 50 33337 48 2596 31 33254 19 5883 21 47157 41 45720 00 00548.15+51.92241.89+69.8349.82-37.91159.62-26.71225.06-89.22200.00+0.22+0.0500 8.已知附合闭合导线的下列数据,计算出各导线点数的坐标值。
点号1A263 39 6B12CD总和552 42 00-60552 41 00CD’
观测角(左角)(°′″)2改正数C改正角坐标方位角(″)(°′″)(°′″)345距离(m)6增量计算改正后增量ΔX(m)ΔY(m)ΔX(m)ΔY(m)78910坐标值X(m)Y(m)1112123.92819.57256.29221.65182.12139.71686.32点号13123456102 29 00190 12 00180 48 0079 13 00-15-15-15-15102 28 45341 10 21190 11 45330 58 36180 47 45330 10 5179 12 4570 58 685.2681.46107.31+1+101.57+1+71.23+1+73.97-1-34.63-1-39.52-1-42.4055.69+101.58+71.24+73.98-34.64157.27-39.53228.51-42.41302.49491.04274.03CD=﹣60″
+246.77-116.55246.8-116.58α
CD’=70°57′06 fB=α-α fB容=±604=±120″
XC-XB=246.8 fx=246.77-246.8=﹣0.03 YC-YB=﹣116.58 fY=﹣116.55-(﹣116.58)=0.03
10.如图3—31,用前方交会法测定P的位置,已知点A,B的坐标及观测的支会角。 解: α
ab’=arctan
yB?yA=68°7′58″
xB?xA∵ΔX>0, ΔY<0,在第四象限 ∴α
AB=291°52′02″
22DAB=?yB?yA???xB?xA?=72.02m 由正弦定理得: DAP=α
sin??DABsin??DAB=89.666m DBP==114.664m
sin?????sin?????AP=αAB-α
=202°13′08″α
BP=αBA+β=αAB-180°+β
=163°18′32″
AP=366.09m
∴XP=XA+ΔXAP=XA+DAPcosαXP=XB+ΔXBP=XB+DBPcosα
AP=316.99m YP=YA+ΔYAP=YA+DAPsinα
BP=316.99m YP=YB+ΔYBP=YB+DBPsinαBP=366.09m
故,P的坐标为(316.99m,366.09m)