Case Studies of the Reorientation Traverse Accuracy
The possibility of computing a traverse having no base angles at the takeoff and closing control stations has been previously published in Chukwuocha et al. (2017). In this computational method, the azimuth of the first traverse leg is indirectly determined between a pair of orphaned control stations without a field-observed reference azimuth line. The base angles at the control stations or the azimuth of the first traverse leg is computed from the geometry of the traverse. Thereafter, the traverse is computed as a normal traverse. This traverse method is termed reorientation traversing. This article will statistically compare the variation in the computed coordinates when using the reorientation traversing method versus the traditional traverse method, which has either known azimuths at each end of the traverse or two previously established control stations at the termini. To make this comparison, a series of four different traverses with varying numbers of new stations were run using both the reorientation and traditional traverse methods. From these case studies, a correctly weighted least squares adjustment was performed, and a statistical test at a 0.01 level of significance was performed on the resultant coordinates. This comparison demonstrates that the two methods produce a set of coordinates that can be considered statistically the same. The results demonstrate that reorientation traversing is a valid procedure when sufficient directional control is not available in the field.
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