Describe a vertical control point, third order or better, recoverable mark, no tablet.

Describe a vertical control point, third order or better, recoverable mark, no tablet.

• A. A vertical control point that is a recoverable mark with no tablet.
• B. A vertical control point with a tablet.
• C. A boundary monument with tablet.
• D. A principal point on provisional edition maps.

Answer: (A)

In surveying, a vertical control point is a fixed reference used to know elevations precisely, and third order or better indicates a high level of accuracy in that vertical measurement. If a point is recoverable, it means future surveyors can locate it again after some time, which is essential for maintaining the vertical control network. Not having a tablet means the mark isn’t inscribed on a formal tablet or plaque; instead, it’s a recoverable ground mark or similar feature that can be found and reoccupied. Putting those ideas together, the description that matches is a vertical control point that is a recoverable mark with no tablet. The other descriptions either imply a tablet is present, refer to boundary monuments, or describe something not specifically a vertical control point of the required order.

In surveying, a vertical control point is a fixed reference used to know elevations precisely, and third order or better indicates a high level of accuracy in that vertical measurement. If a point is recoverable, it means future surveyors can locate it again after some time, which is essential for maintaining the vertical control network. Not having a tablet means the mark isn’t inscribed on a formal tablet or plaque; instead, it’s a recoverable ground mark or similar feature that can be found and reoccupied.

Putting those ideas together, the description that matches is a vertical control point that is a recoverable mark with no tablet. The other descriptions either imply a tablet is present, refer to boundary monuments, or describe something not specifically a vertical control point of the required order.