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Co-ordinate length measured parallel to an assumed meridian direction is known as_____
Bearing
Latitude
Departure
A, B and C
Latitude
Quick Trick: Remember the surveyor's coordinate rule: Latitude is Parallel to the reference meridian (L for Longitude/Length/Parallel line), while Departure is Perpendicular to it.
Remember the surveyor's coordinate rule: Latitude is Parallel to the reference meridian (L for Longitude/Length/Parallel line), while Departure is Perpendicular to it.
Define Latitude in Surveying
Latitude of a survey line is its orthographic projection on the reference meridian. It represents the distance measured parallel to the reference or assumed north-south meridian direction.
Define Departure in Surveying
Departure of a survey line is its orthographic projection on the line perpendicular to the reference meridian (i.e., east-west direction).
Distinguish from Bearing
Bearing refers to the horizontal angle between the reference meridian and the survey line, not a coordinate length measurement.
A: Bearing is the direction angle of a line relative to a meridian, not a linear coordinate length. C: Departure is the length measured perpendicular (east-west) to the meridian, not parallel. D: Since A and C are incorrect, option D cannot be correct.
B is correct because Latitude is defined as the coordinate length of a survey line measured parallel to the reference or assumed meridian.
Always link directional terms in surveying: Latitude corresponds to North-South (Parallel to Meridian), whereas Departure corresponds to East-West (Perpendicular to Meridian).