What technique is commonly utilized to establish a vertical control point?

The technique commonly utilized to establish a vertical control point is leveling. Leveling is a precise surveying method used to determine the height differences between points, which is essential for establishing vertical control points. This technique involves measuring the vertical distances relative to a reference point, ensuring that the elevation of the control point is accurately determined.

Leveling is critical in construction, mapping, and various engineering projects, ensuring that all subsequent measurements or structures are correctly aligned vertically. By establishing a reliable vertical control point through leveling, surveyors can ensure the accuracy and integrity of their work, facilitating proper drainage, foundation placement, and overall site design.

Other techniques, such as re-sectioning and trilateration, are primarily used for horizontal positioning rather than establishing vertical control. Benchmarking is a related concept referring to the use of established points of known elevation, but it doesn't describe the process of measuring and establishing a vertical control point directly.