Geodetic measurements are techniques used to determine the precise positions and shapes of the Earth and its features. These measurements help in mapping, navigation, and understanding the Earth's physical properties. They involve the use of tools like GPS and theodolites to collect data about distances, angles, and elevations. These measurements are essential for various applications, including land surveying, construction, and environmental monitoring. By analyzing the data, scientists can track changes in the Earth's surface, such as tectonic movements and sea-level rise, which are crucial for planning and managing natural resources effectively.