Methods of performing aerotraingulation in 3d aerial photogrammetry may be classified into one of three categories. The three types of aerotraingulation in 3d aerial photogrammetry are Analog, Semi analytical and Analytical.
Early Analog procedures of aerotraingulation in 3d aerial photogrammetry involved manual interior, relative, and absolute orientation of the successive models of long strips of photos using stereoscopic plotting instruments having several projectors. This created long strip models from which coordinates of pass points could be read directly. Later, universal stereo plotting instruments were developed which enabled this process to be accomplished with only two projectors. These procedures are now principally of historical interest, having given way to the other two methods.
Analytical methods of aerotraingulation in 3d aerial photogrammetry consist of photo coordinate measurement followed by numerical interior, relative. and absolute orientation from which ground coordinates are computed. Various specialized techniques have been developed within each of the Aero triangulation categories.
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