What best describes a turning point (TP) in the leveling process?

What best describes a turning point (TP) in the leveling process?

• A. An intermediate point between two bench marks to continue leveling.
• B. A measurement of horizontal angle.
• C. A point of known elevation.
• D. The height of the instrument.

Answer: (A)

In leveling, a turning point is a spot used to change the direction of the level line so you can continue measuring to the next section. It is typically an intermediate point placed between two bench marks to allow the line of sight to be redirected and the leveling run to be extended. This point isn’t about measuring a horizontal angle, it isn’t simply a known elevation by itself, and it isn’t the height of the instrument. Instead, its role is to provide a practical place to reorient and continue determining elevations to the subsequent point. For example, if you have two bench marks far apart, you measure to an intermediate turning point, then proceed from there to reach the second bench mark, using the readings to tie the elevations together along the route.

In leveling, a turning point is a spot used to change the direction of the level line so you can continue measuring to the next section. It is typically an intermediate point placed between two bench marks to allow the line of sight to be redirected and the leveling run to be extended. This point isn’t about measuring a horizontal angle, it isn’t simply a known elevation by itself, and it isn’t the height of the instrument. Instead, its role is to provide a practical place to reorient and continue determining elevations to the subsequent point. For example, if you have two bench marks far apart, you measure to an intermediate turning point, then proceed from there to reach the second bench mark, using the readings to tie the elevations together along the route.