When the effect of curvature is taken into account in levelling, the true staff reading is obtained by

Question

Quizplus · Accepted Answer

When considering the effect of curvature in levelling, the true staff reading is obtained by subtracting the curvature correction from the observed reading. This is because the Earth's curvature causes the line of sight to be higher than the actual level surface, leading to an overestimation of the height.

When the Effect of Curvature Is Taken into Account in Levelling