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PROBLEMS OF THE PHOTOGRAMMETRIC METHOD FOR DETERMINING THE AREA OF A CITY BLOCK

The problems of using aerial photographs in determining the area of a built-up area are considered. The problems caused by dead zones, where it is impossible to bring a measuring stereomark on the surface of a 3D model, are briefly described. Such places are covered by the shadow of buildings, the roofs of buildings or tree crowns. Recommendations are given to eliminate the influence of dead zones. 