Definitions [3]
Definition: Line of Sight
The straight line joining the eye of the observer to the point on the object being viewed.
Definition: Angle of Depression
The angle between the line of sight and the horizontal through the observer’s eye, when the object is below the level of the observer’s eye.
Definition: Angle of Elevation
The angle between the line of sight and the horizontal through the observer’s eye, when the object is above the level of the observer’s eye.
