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"Photogrammetry is the science of making measurements from photographs, especially for recovering the exact positions of surface points. It may also be used to recover the motion pathways of designated reference points on any moving object, on its components, and in the immediately adjacent environment. Photogrammetric analysis may be applied to one photograph, or may use high-speed photography and remote sensing to detect, measure and record complex 2-D and 3-D motion fields (see also sonar, radar, lidar, etc.). Photogrammetry feeds measurements from remote sensing and the results of imagery analysis into computational models in an attempt to successively estimate, with increasing accuracy, the actual, 3-D relative motions within the researched field." (

The 3D headframe study. The site is the Townsite mine located at the west entrance of historic Cobalt, Ontario, Canada. Pix4D was used to process the orthographic aerial map and the 3D terrain model. This project was conducted with the help of the iCamp group at Canadore College in North Bay, Ontario.