The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is

A. f/H sec θ

B. f sec θ/H

C. f/H

D. f/H cos ½θ

Answer: Option A

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Related Questions on Surveying

Which of the following statements is incorrect ?

A. Error due to refraction may not be completely eliminated by reciprocal levelling.

B. Tilting levels are commonly used for precision work.

C. The last reading of levelling is always a foresight.

D. All of the above statements are incorrect.