Week1 Flashcards
(14 cards)
Surveying measurements
Includes horizontal angles, vertical angles, and distances (horizontal, slope, vertical).
Scales
Ratio between the drawing of an object and the actual object, expressed in words, drawn scale, or fraction (e.g. 1cm represents 2m, 1:200).
Azimuth
A horizontal angle that always measures clockwise from North, used to indicate a direction.
Bearing
Angular measurement with a range of 0° ≤ Bearing < 90°.
Quadrant I Azimuth
Azimuth = theta.
Quadrant II Azimuth
Azimuth = 180° - theta.
Quadrant III Azimuth
Azimuth = 180° + theta.
Quadrant IV Azimuth
Azimuth = 360° - theta.
Trilateration
The determination of a point’s position using measured distances to that point from at least three known points.
Triangulation
The determination of a point’s position using measured angles from at least two other known points.
Temperature Correction
Correction applied to tape measurements due to temperature differences, calculated as Correction = α * L * (t - ts).
Coefficient of Linear Expansion (α)
A constant that represents how much a material expands per degree of temperature increase.
Surveying
The process of measuring distances, angles, and positions to determine the location of points on the earth’s surface.