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						-1.423	78.171	-0.001	78.170
3						+0.254	78.425	0.000	78.424
4						-1.883	76.542	-0.001	76.540
5						-0.640	75.902	0.000	75.900
6						+0.112	76.014	0.000	76.012
7						+1.057	77.071	0.000	77.069
8						+0.691	77.762	0.000	77.760
9						+1.226	78.988	0.000	78.986
10						+0.359	79.347	-0.001	79.344
11						+2.232	81.579	0.000	81.576

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 29 to BM 142	9.306	7.321	1.985	1.982	3