What type of survey involves a common datum for a series of levels?

A leveling survey is specifically designed to determine the elevation of points across a particular area by establishing a common datum. In this type of survey, measurements are taken to ensure that all elevations are referenced to the same baseline level. This is crucial for various applications, including construction and civil engineering, where precise elevation data is necessary to ensure that structures are built according to specified level heights.

By using a common datum, surveyors can accurately calculate the height differences between various points, which is essential for creating a reliable framework for projects involving grading, drainage, and other elevation-sensitive tasks. Leveling surveys can also be used to monitor changes in land elevation over time, making them a vital tool in both engineering and environmental assessments.