Photogrammetry

Question 1

What is better? Smaller or larger focal length on a camera?

Answer 1

Smaller is better. The smaller focal length the better measurement you can get of parallax. A 6in camera focal length is better than an 8 in.

Question 2

Does the elevation of the monument need to be flush with the panel for a flight target?

Answer 2

Yes

Question 3

Should ground control locations be determined under power lines?

Answer 3

No