Calculate the height of a building where the ground is sloping up or down from the observer.
Known values: Height h of the observer, horizontal distance d, vertical angle θ, ground slope angle α.
Solution: Height of the building H+h.
First, measure horizontal distance d, vertical angle θ, and ground slope angle α from observer point A.
Calculate vertical distance H:
Calculate building height above the ground:
*Note that this method assumes that the horizontal distance can be measured from observer point.
Given the rate and direction of full dip of a pla...
Given the rate and direction of full dip of a plan...