Question

show working out with equations please


Differential leveling was performed from BM A to BM B. The forward length of the section from BM A to BM B was 1,481 meters and the returning length of the section from BM B back to BM A was 1,845 meters. This level section resulted in a misclosure of 0.004 meters. What Survey Order and Class would this misclosure meet, based on the "Standards and Specifications for Geodetic Control", Federal Geodetic Control Committee, 1984?

Answer 1

Given, Differential levelling performed from BM A to BM B,

Forward length = 1481 m

Backward length = 1845 m

Misclosure = 0.004 m

According to ''Standards and Specifications for Geodetic Control", Federal Geodetic Control Committee, 1984''.

Order	First	First	Second	Second	Third
Class	I	II	I	II
Difference of Forward and Backward sight Lengths never to exceed
per setup (m)	2	5	5	10	10
per section (m)	4	10	10	10	10

Therefore, the misclosure is of the First Order Class-I