Scale and resolution of the image capture by aircraft, I’m wondering if there is a mathematical relation between the scale and resolution of the image captured by aircraft and thus the table below can be justified: (sorry i couldn't insert the screenshot here from my hard drive) Mathematically, the scale of the image captured by the aircraft can be obtained from the equation: Scale = 1/(H/f) where H is the flying height of the aircraft and f is the focal length of the camera length. For example, assume that the flying height of the aircraft is 1800m and the focal length of the lens is 15cm then the scale of the image is = 1/(1800/.15)=1/12000 Then how the resolution and the scale of the map can be linked in a mathematical equation? Best Jamal