The relief displacement of a building 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is
A. 500 m
B. 1000 m
C. 1500 m
D. 2000 m
Answer: Option B
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Which of the following methods of contouring is most suitable for a hilly terrain?
A. Direct method
B. Square method
C. Cross-sections method
D. Tachometric method
A. 750 mm × 900 mm
B. 600 mm × 750 mm
C. 450 mm × 600 mm
D. 300 mm × 450 mm
A. 22° 30'
B. 23° 27'
C. 23° 30'
D. 24° 0'
d=7.2mm=0.72cm
r=10cm
h=72m
d=rh/H
H=rh/d=10*72/0.72=1000m
option B
Building ht. 72m
Displacement 7.2mm
Flying ht = (72m/7.2 mm)*10cm=1000m