The distance in the x direction between two control points on a vertical aerial photograph is 6.2". If the distance between these same two points is 4.9" on another photograph having a scale of 1:24,000, determine the scale of the first vertical aerial photograph. If the focal length of the camera is 6"and the average elevation at these points is 300 ft, determine the flying height from which each photograph was taken.
What will be an ideal response?
Let the actual distance between the points MN be x feet
M'N' = 4.9 in = 0.40833 ft
(M'N') / (MN) = (ON') / (ON) = Scale 1:24,000
1 / 24000 = 0.0.40833 / x
x = 9800 feet
Now solve for the scale of the second photo.
M'N = 6.2 in = 0.5167 ft
Scale = 0.5167 / 9800
Scale = 1:18,970
Now determine the height from which the first photo was
taken (H1).
1 / 18,970 = (6.0/12) / (H1 – 300)
H1 = 9,784 feet
Now determine the height from which the second photo was taken (H2).
1 / 24,000 = (6.0/12) / (H2 – 300)
H2 = 12,300 feet
Therefore, the scale of the first photograph is 1:18,970, the elevation it was taken
from is 9,784 feet, and the second photograph was taken at an elevation of 12,300
feet.
You might also like to view...
A major safety consideration in the power equipment engine repair business is ____________________ prevention.
Fill in the blank(s) with the appropriate word(s).
If two power-side insulated wires were to melt together to the point that the copper conductors touched each other, the type of failure would be called a(an) ________.
A) Short-to-voltage B) Floating ground C) Short-to-ground D) Open
If the order quantity is increased, the annual cost of carrying inventory will:
A) remain the same. B) decrease. C) not be affected. D) increase. E) none of the above
A quarter horse is designated as having a _____ body.
Fill in the blank(s) with the appropriate word(s).