法方程的系数阵NBB的逆阵为：
?0.2391?-0.1905?-0.19050.0573-0.05660.0710-0.06210.0343-0.00200.0201-0.04750.00680.25560.00120.1473-0.03290.0880-0.00040.01020.01490.1285-0.00090.0038?0.0102????0.05730.00120.2468-0.01330.2249-0.09900.1277?-0.05660.1473-0.01330.2040-0.03030.09670.0105??0.0710-0.03290.2249-0.03030.2826-0.02980.1962N?1TPB)?1??-0.06210.0880-0.09900.0967-0.02980.43080.0909BB?(B??0.0343-0.00040.12770.01050.19620.09090.2116?-0.00200.01020.00190.01940.02950.06320.0303??0.02010.01490.08990.03440.0879-0.02860.0561??-0.04750.1285-0.04480.2220-0.04000.09470.0090?0.0068-0.00100.0263-0.00120.03510.01280.0323??0.00380.01020.01900.026200.06510.07870.0852由x??N?1BBW计算得参数改正数:
???xP1??8.99??y??P?1?4.26??x?????P2??y?????1.80??P6.64?2??x???P?3 x???y?????6.61??P3??10.29??x??????4?12.18? P?y????P4??0.27???x?P??57.24???y????P5??22?x???.90??P6???3.21?y?P6???????2.17??
0.00190.0899-0.04480.02630.0190?0.01940.03440.2220-0.00120.0262??0.02950.0879-0.04000.03510.0651?0.0632-0.02860.09470.01280.0787??0.03030.05610.00900.03230.0852? 0.13410.00630.0247-0.01480.1692??0.00630.23640.16690.01020.0166?0.02470.16690.3886-0.00340.0355??-0.01480.0102-0.00340.0721-0.0722??0.16920.01660.0355-0.07220.3260??20
3.5 平差值计算
?=Y0+y?=X0+x?、Y?计算得待定坐标平差值： 由Xiiii??X0?x??Y0?y??P1=272.2457m =825.8190m XYPPPPP11111??X0?x??Y0?y?=740.1052m Y?=321.5856m XP2P2P2P2P2P2??X0?x??P3=768.3334m YXP3P3P3??X0?x??P4=732.0288m YXP4P4P4???X0?x?P5=681.6372m YXP5P5P5??X0?x??=674.5638m YXP6P6P6P6?P3=392.2197m ?YP0?y3?P4=470.8853m ?YP04?y?P5=279.3229m ?YP0?y5?P6=506.1748m ?YP0?y6??l得观测值改正数，结果见表4 由V=Bx
表4 观测值改正数 V19 -72.48 V5 -3.83 V10 -4.88 V15 -4.78 V20 -45.61 3.6 精度计算 V1 -6.54 V6 9.98 V11 -1.54 V2 -4.87 V7 -6.55 V12 9.80 V3 -2.29 V8 4.70 V13 3.21 V4 2.25 V9 1.74 V14 -1.96 V16 -7.95 V21 -21.52 V17 -33.85 V22 -20.23 V18 -29.13 V23 -3.12 VTPVVTPV10190.73?0?3.6.1 单位权中误差计算：????30.44；
rr113.6.2 待定点点位中误差计算： ?122由NBB中可得未知数的权倒数（权倒数的单位为mm秒）
QX?0.2391，QY?0.2556;QX?0.2468,QY?0.2040 ????P1P1;P2P2QX?P3?0.2826，QY?P3;?0.4308;QX?0.2116,QY?0.1341 ??P4P4QX?P5?0.2364，QY?P5;?0.3886;QX?0.0721,QY?0.3260 ??P6P6则各点点位中误差：
?X?0QX?14.88mm、??P???0QX?Y????0QY??15.39mm、?????QY?21.41mm； ???P1P1P1P11P1P1?X?0QX?????P2P3P2?P2???0QX?Y????0QY??13.75mm、??QY?20.44mm； ?15.12mm、???P2P2P2P2?X?0QX??????X???X??P4P3?P3???0QX?Y????0QY??19.98mm、??16.18mm、??QY?25.71mm； ??P3P3P3P3?0QX????0QX???P4?Y????0QY??14.00mm、?P4P4?P4???0QX?11.15mm、??QY?17.90mm； ??P4P4P5P5?Y????0QY??14.80mm、?P5P5?P5???0QX?18.98mm、??QY?20.06mm； ??P5P5?X?0QX?????P6P6?P6???0QX?Y????0QY??17.38mm、??QY?19.21mm。?8.17mms、???P6P6P6P6 21
参考文献
[1] 武汉大学测绘学院测量平差学科组.误差理论与测量平差基础.武汉:武汉大学出版社，2009 [2] 武汉大学测绘学院测量平差学科组.误差理论与测量平差基础习题集.武汉:武汉大学出版社，
2005
[3] 潘正风，杨正尧，程效军等.数字测图原理与方法.武汉:武汉大学出版社，2004 [4] 郭玲文.AutoCAD2006中文版基础教程.北京:清华大学出版社，2006 [5] 邓瑞新编.大学计算机基础.贵阳：贵州大学出版社，2007
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指导老师评语：
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