Question

Aerial photography was taken at a flying height H ft above average terrain.

If the camera focal plane dimensions are 9 x 9 in, the focal length is fand the spacing between adjacent flight lines is X ft, what is the percent sidelap for the data given in Problem?

H 7000; f 88.90 mm; X 13,500

Answer 1

% od sidelap is
`P_w = 0.251\ or\ 25%`

Step-by-step explanation:

Given data:

flying height is 7000 ft

focal dimension is 9× 9

focal length f = 88.90 mm

side width is x = 13,500 ft

we know side width is given as

`x = (1- P_w) (w)/(s)`

where s is scale and given as
`s = (f)/(h)`

`13,500 = (1- P_w) * ((9)/(12))/((0.29)/(7000))`

`(1- P_w) = 0.748`

`P_w = 0.251\ or\ 25%`