What is a photogrammetric survey used for?

A photogrammetric survey is primarily used to determine the position of photographed objects, and this is achieved through the process of aerial photogrammetry. This method involves capturing images from elevated perspectives, typically using aircraft or drones, and then analyzing these images to extract geometric information about features on the Earth's surface. By calculating the spatial relationships of various photographed objects, surveyors can create detailed maps, models, or digital terrain representations that support a variety of applications in fields like mapping, land development, and environmental analysis.

The use of aerial photogrammetry allows for efficient data collection over large areas, making it an essential tool for surveyors aiming to gather high-accuracy spatial data without the need for extensive ground surveys. This distinguishes it significantly from other options, which do not specifically relate to the primary function or outcome of a photogrammetric survey.