Shown below in a table is a set of differential leveling notes. Determine the elevations at each location and apply any checks. Leveling work was started from BM20 and was ended to BM21. Show all your work (there is space on the next page). (BS = backsight, IS = Intermediate sight, FS = Foresight). %3D Station BS IS FS Elevation BM20 8.27 240.48 TP1 9.21 2.60 0+00 11.3 0+50 9.6 1+00 6.1 TP2 7.33 4.66 1+50 5.8 2+00 4.97 BM21 3.88

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Errors in surveying

An error in surveying is defined as the difference between two or more values of an identical quantity. However, the estimates are never accurate and there will always be a degree of variability regardless of the research tool or method used. These differences are known as errors that need to be reduced or eliminated to maintain certain levels of accuracy. Even if you carefully follow the prescribed test procedures, the considerations may contain errors.