By its adjustment procedure, the effect formula of initial-bearing's error on adjustments of a straight and equal-side connecting traverse are introduced with the method of true error analysis.

结合附合导线平差过程，文中用真误差分析方法推导了起始方位角误差对附合导线平差结果的影响公式；通过分析与数据计算，得到了起始方位角误差对平差后导线点坐标和导线边方位角的影响规律；

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