Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 3 (Q.No. 43)
43.
In photogrammetric surveying, the image of the top of the hill is 90 mm, from the principal point of the photograph. If the elevation of the top of the hill is 500 m and the flying height is 5000 m above datum, then the relief displacement is
Discussion:
3 comments Page 1 of 1.
John said:
8 years ago
Please explain it.
(1)
Vikas said:
7 years ago
Relief displacement= [rxh]/H =( 90 x 500)/(1000 x 5000) = .009 m = 9 mm.
Gaurav Pitroda said:
2 years ago
Relief displacement (d) = rh/H.
r = 90 mm.
H = 5000000 mm.
h = 500000 mm.
d= ( 90 x 500000 )/5000000
Ans is = 9 mm.
r = 90 mm.
H = 5000000 mm.
h = 500000 mm.
d= ( 90 x 500000 )/5000000
Ans is = 9 mm.
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