Similar to Problem 27.17, except xa = -52.53 mm, ya = 69.67 mm, xb = 26.30 mm, yb = -59.29 mm, line length AB = 4706 ft, and elevations of points A and B are 925 and 875 ft, respectively.
Problem 27.17:
On a vertical photograph, images a and b of ground points A and B have photographic coordinates xa = 3.27 in., ya = 2.28 in., xb = -1.95 in., and yb = -2.50 in. The horizontal distance between A and B is 5283 ft, and the elevations of A and B above datum are 646 ft and 756 ft, respectively. Using Equation (27.9), calculate the flying height above datum for a camera having a focal length of 152.4 mm.