Surveying & Geomatics Flashcards
6 cards from real BCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Surveying & Geomatics flashcards as text
In plane surveying, which coordinate system is commonly used in the United States for state-based mapping?
Answer: State Plane Coordinate System (SPCS)
The State Plane Coordinate System (SPCS) is a set of 124 geographic zones used in the United States for high-accuracy surveys at the state and local level.
What is the purpose of a bench mark (BM) in surveying?
Answer: To serve as a permanent reference point of known elevation
A bench mark is a permanent, stable monument with a precisely determined elevation used as a reference point for leveling surveys.
Which error in leveling surveys accumulates proportionally to the square root of the distance traveled?
Answer: Random error
Random errors in leveling accumulate in proportion to the square root of the number of setups or distance, following statistical principles of error propagation.
The magnetic declination in surveying accounts for the difference between which two directions?
Answer: True north and magnetic north
Magnetic declination is the angle between true (geographic) north and magnetic north at a given location, which varies with location and time.
In route surveying, a simple circular curve is defined by which primary parameter?
Answer: Radius or degree of curvature
A simple circular curve is primarily defined by its radius R (or equivalently, the degree of curvature D), from which all other curve elements are derived.
Which photogrammetric technique uses overlapping aerial photographs to generate 3D topographic data?
Answer: Stereoscopy
Stereoscopy uses the parallax between overlapping aerial photographs viewed from two different positions to reconstruct the 3D geometry of the terrain.