Photogrammetry
Photogrammetry is the science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring, and interpreting photographic images. Historically, the discipline was significantly advanced by Aimé Laussedat, who is often credited with developing the first methods for using terrestrial photographs for topographic map compilation. The field integrates complex principles from Optics, Mathematics, and Projective Geometry.
A primary application of this field is the creation of Topographic Maps and Digital Elevation Models. Through Stereophotogrammetry, two or more images of the same scene taken from different positions are used to calculate three-dimensional coordinates. Modern workflows frequently utilize Drones and UAVs to capture high-resolution imagery for industries such as Agriculture, Construction, and Mining. Technical documentation and professional standards are maintained by the American Society for Photogrammetry and Remote Sensing.
In the digital age, Computer Vision has revolutionized the field through Structure from Motion (SfM) algorithms. These allow for the generation of dense Point Clouds and textured 3D Models from unordered collections of photos. The United States Geological Survey (USGS) utilizes these techniques for environmental monitoring and hazard assessment. Furthermore, photogrammetry provides critical data for Archaeology and Forensics. More information on global standards can be found at the International Society for Photogrammetry and Remote Sensing.