Question

Which one of the following parameters does NOT affect the scale of a vertical aerial photograph?

• A. Size of the photograph
• B. Focal length of the camera
• C. Flying height
• D. Terrain elevation

Hint:

The scale of a vertical aerial photo depends on the focal length, flying height, and terrain elevation—but not the physical size of the photograph.

Answer 1

The Correct Option is A

The scale of a vertical aerial photograph is primarily given by the formula:
\[ \text{Scale} = \frac{f}{H - h} \] where:
- \( f \) is the focal length of the camera,
- \( H \) is the flying height above mean sea level,
- \( h \) is the terrain elevation above mean sea level.

From the formula, it is evident that the scale is influenced by:
- Focal length (\(f\))
- Flying height (\(H\))
- Terrain elevation (\(h\))

The size of the photograph impacts the area covered but does not affect the scale. Scale is determined by the ratio of the camera's focal length to the altitude above ground, and remains independent of the print or image size.

Hence, the correct answer is:
\[ \boxed{\text{Size of the photograph}} \]