surveying Chapter 4 Curvature & Refraction

[@danishansari-vd8yv]

Excellent

[@jaialai3257]

How can refraction be calculated on distance alone? Wouldn't the amount of this deviation vary due to things like air pressure and density, humidity, temperature, and elevation?

[@armorvestrus4119]

Seeing that errors become greater over distance why not just limit the range to the rod? I have witnessed people using lasers at six to ten miles and the spread of the beam becomes to great to measure a point. Anyway this error in the atmosphere show how important a clear line of sight is too a surveyor.

[@bzssheetmetal6783]

We.see to far away with p900 camera witch proves that 8"per mile square is way wrong