Drone photogrammetry is the process of using unmanned aerial vehicles (UAVs or drones) to capture aerial photographs of an area and then analyzing those images to create accurate measurements, maps, and 3D models. The UAVs are equipped with cameras and fly over the target area, taking overlapping photographs from different angles and altitudes. The photographs are then processed using specialized software to create a 3D model of the terrain, which can be used to create maps, measure distances, and analyze changes over time. Drone photogrammetry has numerous applications, including in agriculture, land surveying, urban planning, construction, and environmental monitoring. It is a cost-effective and efficient way to gather data from large areas, and it can be used to generate highly detailed and accurate maps and models.