Photogrammetry is a technique used to measure and analyze physical objects and environments through photographs. By taking multiple images from different angles, software can create accurate 3D models or maps. This method is widely used in fields like architecture, engineering, and geography. The process involves capturing images with a camera, which can be a regular digital camera or a specialized drone. The software then identifies common points in the images to reconstruct the object's shape and dimensions. Photogrammetry is valuable for creating detailed visual representations without needing direct contact with the subject.