1. The photo distance between two image points a and b on a vertical photograph is ab and the corresponding ground distance is AB. What is the photographic scale at the elevation of the ground line? (Give the answers both in unit equivalents and dimensionless ratios). (a) ab = 189.5 mm; ground distance AB is 429.5 meters. (b) ab = 148.3 mm; ground distance AB is 3784 feet. (c) ab = 195.7 mm, ground distance AB is 0.798 miles. (d) ab = 120.0 nun; ground distance AB is 80.00 rods.
2. On a vertical photograph two section corners are measured to be 2.95 inches apart. What is the photographic scale at the elevation of the section line?
3. A railroad boxcar of 80.0 foot known length measures 11.2 mm on the photo. What is the photographic scale at the elevation of the boxcar?
4. A vertical photograph was taken with a camera having a 6 inch focal length, from a flying height 7500 feet above sea level. What is the scale of the photo at an elevation of 1420 ft above sea level?
5. A vertical aerial photograph was taken from a flying height of 10,500 feet above datum with a camera having a focal length of 209.45 mm. Highest, lowest and average terrain appearing in the photograph are at 6,650 ft, 3,085 ft, and 4800 ft respectively. Calculate minimum, maximum, and average photographic scale.
6. A vertical photograph was taken over the lunar surface from an altitude of 60 miles with a 80.20 mm focal length camera. What is the actual diameter of a crater whose diameter on the photograph scales 10.63 mm?
7. Vertical photography for military reconnaissance is required. If the lowest safe flying height is 15,000 feet, what camera focal length is necessary to achieve a photo scale of 1:24000?