Calculate the height of an object from a baseline when its projected position to the ground is inaccessible. Case scenario when baseline AB on sloping ground and collinear with object.
Baseline sloping distance AB and height h1 of the observer.
Angles measured at A – Vertical angles α and δ (slope of ground between A and B).
Angle measured at B – Vertical angle β.
Solution: Height of object above ground at position A.
First, measure sloping distance AB. From observer point A1, measure vertical angles α and δ. From observer point B1, measure vertical angle β.
In triangle A1ΟB1,
Then calculate sloping distance A1O:
Finally, calculate height of object above ground at station A:
Given the rate and direction of full dip of a pla...