Even if you take a picture from a plane, what does it prove? You are taking a picture through a rounded window that's bulging out, and using a rounded lens on your camera. Besides, even if you got a picture of a perfectly flat earth, you could always mess with it in Photoshop and apply a fisheye effect to it just to prove that the earth is round.
Besides, I can tell you that the earth is flat. If you lived where I live... man, I'm talking FLAT. You can watch your dog run away... for days!