What are "control points" in a geodetic survey?

Control points in a geodetic survey are defined as fixed locations that serve as reference points for measurements. These points are crucial since they provide a consistent framework for geographic positioning and measurements. They are typically established through precise surveying techniques and are often marked with physical markers on the ground.

Control points are used in various applications such as mapping, construction, and geographic information systems (GIS). By utilizing these fixed references, surveyors and engineers can ensure accuracy in their measurements and maintain the integrity of spatial data over time. The precision of these locations allows for the reliable comparison and adjustment of other measurements taken in the survey.

The other options do not align with the definition of control points. Floating markers in the ocean do not serve the purpose of fixed reference points, while sorting points for geographic data and randomly chosen reference points lack the required precision and reliability inherent to control points in a geodetic context.