Looking straight down from a low level produces a fuzzy image. Why?
This is due to the resolution of the photography – each pixel in the image covers 2x2m on the ground so don’t expect to read car number plates! At higher altitudes the image will appear sharp but once a pixel on the screen covers less than 2x2m on the ground then the image will become cloudy or fuzzy. There is a minimum height restriction of 100m but we would expect the tilt to be near horizontal rather than straight down – this allows you get reasonably close to the ground and look along valleys, etc.
