Measuring with the Level - Height Difference between two Points

Surveying Made Easy

Height Difference between two Points The basic principle of levelling involves determining the height difference between two points. To eliminate systematic errors related to atmospheric conditions or to residual line-of-sight error, the instrument should be about equidistant from the two points. The height difference is calculated from the difference between the two staff readings for the points A and B respectively. 8 | Measuring with the Level R = backsight V = foresight iH = R – V = 2.521 – 1.345 = 1.176 Slope in % = 100 x iH / D A Reading: 2.521 Reading: 1.345 B iH D


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