2.18 Reciprocal leveling involving..

 single level was used to transfer height. across a river between two points R1 and R2 70 m apart. Using the following readings, calculate the height change from R1 to R2 and the collimation error in the level. Level set up close to R1: Staff reading on R1 = 1.582 m Staff reading on R2 = 0.792 m Level set up close to R2: Staff reading on R1 = 2.112 m Staff reading on R2 = 1.336 m

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