Mendel
Senior Member.
it's not just trivial, it's meaningless, because the measurement of the jet in the photo is less accurate than that, and thus determines the (in)accuracy of the computation.The difference that this probably exaggerated length estimate makes is trivial- but it is unexpected in a supposed forensic examination of a photograph.
47'2" = 566"±½"(1) 47 feet 2 inches is actually 14.376 m
566"±½" × 0.0254m/in = 14.3764m±0.0127m = 14.3637 to 14.3891m
Writing that it equals 14.376 pretends to an accuracy that wasn't there before the conversion. Rounding to 3 or 4 digits is sensible.