Gradient of a line

Master Farm Structure and Surveying – Notes, Case Studies & Practical Insights – with Rahul

Gradient of a line

To calculate the gradient between two points:

a) Find the elevation difference: Subtract the Reduced Level (RL) of the first point from the second point. If the difference is negative, it indicates a down gradient, and if positive, it indicates a rising gradient.

b) Calculate the distance: Multiply the total number of foresights and intermediate sight readings by the constant distance between consecutive stations.

c) Determine the gradient: Divide the distance by the elevation difference to obtain the gradient of the line:

Gradient = Distance/ Difference in Elevation

For more advanced calculations, corrections for curvature, refraction, and reciprocal levelling are applied.