Line AB was appearing on two overlapping photographs. Knowing that the flying height above datum was 2000 m and the air base was 650 m, the camera had a 10cm focal length, and the measured photographic coordinates (in mm) on the left-hand image are xa = 50 mm, ya = 45 mm, xb = 85 mm, and yb = -38 mm; on the right-hand image, X1a = -60 mm, and X1b = -50 mm. Determine the coordinates of point A (Xa and Ya). Determine the coordinates of point B (Xb, and Yb). Determine the length of line AB. Determine the elevation of point A. Determine the elevation of point B.

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