The difference between a point cloud and photogrammetry is in the way the data is captured and represented. A point cloud is a set of 3D points that represent the geometry of an object or space. Point clouds are typically generated using scanning technologies like LiDAR, or image-based methods like photogrammetry. Photogrammetry involves capturing multiple images of an object or environment from a variety of angles, then using software to calculate dimensions and plot precise points in 3D space.