Which description corresponds to a vertical control point that is third order or better and has a tablet?

Which description corresponds to a vertical control point that is third order or better and has a tablet?

• A. A Vertical control point, third order or better, with tablet.
• B. A Vertical control point, first order, without tablet.
• C. A recoverable mark with tablet.
• D. A boundary monument with tablet.

Answer: (A)

In surveying, a vertical control point is a point used to establish elevations in a network, and its quality is described by an order: first order is the highest precision, then second, then third, with “or better” allowing for even higher accuracy. A tablet is a durable marker or plate attached to the monument that identifies it. The description that best fits all of this is the one that explicitly names a vertical control point, specifies third order or better, and notes the tablet. It directly conveys the necessary combination of role (vertical control point), accuracy level (third order or better), and marker (with tablet). The other options don’t meet all of these criteria: some describe different kinds of marks (recoverable mark or boundary monument) or specify absence of the tablet, so they don’t match the exact combination required for a vertical control point with the stated order and a tablet.

In surveying, a vertical control point is a point used to establish elevations in a network, and its quality is described by an order: first order is the highest precision, then second, then third, with “or better” allowing for even higher accuracy. A tablet is a durable marker or plate attached to the monument that identifies it. The description that best fits all of this is the one that explicitly names a vertical control point, specifies third order or better, and notes the tablet. It directly conveys the necessary combination of role (vertical control point), accuracy level (third order or better), and marker (with tablet).

The other options don’t meet all of these criteria: some describe different kinds of marks (recoverable mark or boundary monument) or specify absence of the tablet, so they don’t match the exact combination required for a vertical control point with the stated order and a tablet.