Orhophotorectifying in the USSR
Author(s)/Corporate Author (s)United Nations. Economic and Social Council;
United Nations. Economic Commission for Africa;
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The result of subsequent works in this field was a new differential photo rectifier - OFPD orthophoto projector. The instrument was constructed upon the universal stereophotogrammegic plotter stereograph SD-3 base. OFPD permits to process air. photos with affine transformation. Image of the right photo is projected for rectification.