Question

Consider the following:
Scale of photograph : 1 cm = 100 m
Size of photograph = 23 cm x 23 cm
Area to be covered = 170 sq.km
Longitudinal overlap= 60%
Side overlap = 30%

The total number of photographs required for covering the above area is

• A. 115
• B. 127
• C. 143
• D. 98

Answer 1

The correct option is A 115

$N=\frac{Areaonground}{{(sizeofphotograph\times scaleofphotograph)}^2\times (1-P_L)(1-P_s)}$

$=\frac{170\times {10}^3\times {10}^3{m}^2}{{(23cm\times \frac{100m}{1cm})}^2\times (1-0.6)(1-0.3)}$

$=114.77\approx 115$