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Restoration of Lost Corners by Proportionate Measurement
 
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  Section 1 - Non-Riparian Broken Boundary Adjustments

The nonriparian broken boundary adjustment is based upon two basic assumptions. First, that the errors in the surveying process are accidental, and second, that the effects of errors in angular measurement are equal to the effects of errors in chaining. Based upon the previous two assumptions, the general rule for nonriparian broken boundary adjustment is that the adjustment in latitude for each course is to the resolved latitude of the closing error as the accumulated length of that course, or courses is to the sum of all courses, or L1 is to L, as C1 is to C, or L2 is to L, as C2 is to C in our diagram. The same basic formula applies also to departure, so D1 is to D, as C1 is to C and so on. These rules for proportionate resurvey would apply, for example, in the situation where the original meanders were erroneous. The land between the erroneous meanders and the actual water's edge is omitted land. In this situation the erroneous meanders become a fixed boundary and the nonriparian broken boundary adjustment is used to compute the position of that boundary between meander corners.

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