I am not a photographer and all I know about taking pictures is to push the button. Can anyone help me determine what the field of view would be at a few set altititudes? I read online that it has a 90 degree field of view, but I looked up the chart and it was asking all sorts of questions which I had no clue about. So if someone could give me an approximate on-the-ground measurement of how wide the field of view on the ground is at say 50 ft, 100ft 150ft and 200ft elevations, that would be cool. I may want to use it for mapping some very rugged terrain and this information would be useful.