Question

For a constant flying height, the average scale of an aerial photograph depends on which of the following parameter?

• A. \( \text{Focal length of the camera} \)
• B. \( \text{Size of the photograph} \)
• C. \( \text{Size of the objects in the area} \)
• D. \( \text{Shape of the objects in the area} \)

Hint:

Recall the basic scale formula for aerial photographs: Scale = focal length / flying height.

Answer 1

The Correct Option is A

For a constant flying height above the ground (H), the average scale (S) of a vertical aerial photograph is primarily determined by the focal length (f) of the camera lens. The relationship is given by the formula: $$S = \frac{f}{H}$$ Thus, the average scale is directly proportional to the focal length of the camera. The size and shape of objects in the area, as well as the size of the photograph itself, do not directly determine the average scale for a constant flying height.