10. Your final task is to determine the minimum number of photographs needed to create 3-D stereo coverage of the area enclosed in red on the topographical map below. This area that needs imagery data collected is from a landslide in western NC that took out sections of a heavily travel road. The area needing photographing is the red rectangle shown below on the topographical map where the landslide occurred. The area is 6720 feet by 5950 feet. The flight plan will be using an UltraCam Eagle Mark 3 with a focal length of 100.5mm. Assume the following parameters: Side Lap 30% Forward Lap 60% Desired GSD = 0.119 feet CCD Element Size = 4 um Average Ground Elevation = 425 feet # of Pixels Along Track = 17,004 # of Pixels Cross Track = 26,460