Photogrammetry System
Photogrammetry System A brief introduction to Photogrammetry System is given to those who are unfamiliar with the technology. The fundamental principle used by Photogrammetry System is triangulation. By taking photographs in at least two different places, it is possible to develop "sight lines" of each camera at the points of the object. These lines of sight (sometimes called rays because of their optical nature) are cut mathematically to produce three-dimensional coordinates of interesting points. Triangulation is also the principle that is used by theodolites for coordinated measurements. If you know these instruments, you will find many similarities (and some differences) between photogrammetry and theodolites. Even closer to home, triangulation is also the way in which your two eyes work together to estimate the distance (perception of depth). Photogrammetry System This primer is divided into two parts. The photograph describes the photographic prin...