What does "observational geodesy" primarily deal with?

Observational geodesy primarily focuses on the measurement of angles and distances during geodetic surveys, which are critical for establishing the positions of points on the Earth's surface. This branch of geodesy involves the systematic collection of data to determine the geometric and gravitational properties of the Earth. Measurement techniques like triangulation, trilateration, and leveling are fundamental in observational geodesy.

By concentrating on angles and distances, geodetic engineers can accurately calculate the coordinates of points, which is essential for mapping, engineering projects, and various applications in navigation and surveying. This meticulous approach ensures that the Earth’s shape, size, and gravitational field are understood and represented accurately in geospatial applications.

While other options like ocean mapping, studying physical features, and using satellites are important in the broader field of geodesy, observational geodesy specifically zeroes in on the direct measurements that inform our knowledge of the Earth’s geometry.