A reduced level is defined as which?

A reduced level is defined as which?

• A. The vertical distance between a survey point and the adopted level datum; a bench mark is a permanent point of known height above datum.
• B. The horizontal distance between points measured along a line.
• C. The latitude difference between two points.
• D. The height difference between two adjacent features measured by a rough method.

Answer: (A)

A reduced level is the vertical position of a survey point relative to a fixed reference level (the adopted datum). In practice you determine how high the point sits above that datum by performing a leveling process from a bench mark or other known-height reference. The bench mark provides a permanent point with a known height above the datum, which is how you anchor all other measurements. This is why the definition phrasing, describing the vertical distance between the survey point and the adopted level datum, best captures what a reduced level is. The other choices describe horizontal distance, latitude difference, or a rough height difference, none of which define the vertical height relative to a datum.

A reduced level is the vertical position of a survey point relative to a fixed reference level (the adopted datum). In practice you determine how high the point sits above that datum by performing a leveling process from a bench mark or other known-height reference. The bench mark provides a permanent point with a known height above the datum, which is how you anchor all other measurements. This is why the definition phrasing, describing the vertical distance between the survey point and the adopted level datum, best captures what a reduced level is. The other choices describe horizontal distance, latitude difference, or a rough height difference, none of which define the vertical height relative to a datum.