Which of the following is a primary purpose of using control points in surveying?

The primary purpose of using control points in surveying is to ensure consistency and accuracy in measurements. Control points serve as reference markers that provide a known, stable location in the field, allowing surveyors to relate new measurements to a pre-established framework. This is critical because accurate location and alignment of structures and land features depend heavily on precise surveying methods.

Control points reduce the potential for errors in measurement and provide a reliable basis for conducting further surveys. Surveyors utilize these points to establish a coordinate system that can be consistently referenced, which is vital for tasks such as mapping and land development. The integrity of the surveying process relies heavily on these established points, making them essential for achieving the high level of accuracy required in professional surveying activities.

While assessing environmental impacts, determining land value, and sketching survey outlines are important aspects of land use and survey planning, they do not directly relate to the core function of control points in establishing measurement accuracy and consistency.