Differential levelling online calculation

 

 

Basis Data:

Number of measuring points (maximum 200)
Unit of length Meter (m)
Foot (feet, ft)

 

 

Main Table:

  Reading Results
  Name point Backsight (m) Intermediate sight (m) Foresight (m) Elevation bench mark (m) Rise/
Fall (m) 		Reduced level (m) Adjustment
(m) 		Adjusted reduced level (m)
1

     
2

-0.635 151.848 -0.001 151.847
3

-0.345 151.503 0.000 151.502
4

-1.285 150.218 -0.001 150.216
5

-0.033 150.185 0.000 150.183
6

-0.016 150.169 0.000 150.167
7

+2.176 152.345 0.000 152.343
8

-0.988 151.357 0.000 151.355
9

+0.149 151.506 0.000 151.504
10

+1.338 152.844 0.000 152.842
11

+0.642 153.486 -0.001 153.483
12

-0.504 152.982 +0.001 152.980
13

-0.100 152.882 0.000 152.880
14

-0.100 152.782 0.000 152.780
15

-0.100 152.682 0.000 152.680
16

+0.559 153.241 0.000 153.239
17

    +0.962 154.203 +0.001 154.202

 

 

Error evaluation:

Calculate allowable misclosure
Section Sum backsights (m) Sum foresights (m) Difference
∑backsights/∑foresights (m)
(actual value) 		Difference
bench marks
first / last point (m)
(nominal value) 		Nominal-actual value difference (misclosure) (mm)
BM 102 to BM 112 6.963 5.960 1.003 1.000 3
BM 112 to BM 124 2.481 1.764 0.717 0.719 2