Geodetic lines are the shortest paths between two points on the surface of the Earth, following the curvature of the planet. These lines are essential in fields like geodesy, which studies the Earth's shape, orientation in space, and gravitational field. Geodetic lines help in accurately measuring distances and mapping the Earth's surface. In practical applications, geodetic lines are used in navigation, surveying, and cartography. They are crucial for creating accurate maps and for global positioning systems (GPS). Understanding these lines allows for better planning and execution of construction projects, transportation routes, and land use.