Objective Question & Answer

Crab and Drift matches with 3. Aerial

photogrammetry: These terms refer to the effects of crosswinds on an aircraft during

flight,where drift is the lateral deviation from the planned flight line and crab is the angular

rotation of the aircraft to counteract this wind.

Stadia intercept matches with 4. Tachometric

survey: The stadia intercept is the difference between the upper and lower staff readings on 

aleveling rod, used to calculate distances mathematically in tachometry.

Culmination and elongation match with 2.

Astronomical survey: These terms relate to observations of celestial bodies; culmination is

when a star crosses the observer's meridian, and elongation is when a star reaches its

maximum eastern or western angular deviation.

Baseline measurement matches with 1.

Triangulation: A baseline is a precisely measured line on the ground that serves as the

foundation for calculating all other triangle sides in a triangulation framework.