Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 2 (Q.No. 20)
20.
Two hill tops A and B 20 km apart are intervened by a third top C. If the top most contour of the three hill tops are of the same value, state whether the line of sight AB
Discussion:
22 comments Page 2 of 3.
Tark Raj Bhatt said:
3 years ago
It's simple.
Due to the curvature of the earth, centre point is raised than the other two so the line of sight AB is below point C.
Due to the curvature of the earth, centre point is raised than the other two so the line of sight AB is below point C.
(9)
Anomii said:
7 years ago
Considering earth curvature, the intermittent point will be raised, line AB now being like a chord passes below the top of C.
Henry said:
7 years ago
It could be due to curvature of earth surface as the line of sight seems to deviate upward.
ANIL said:
10 years ago
Line of sight will diverges downwards with distance. So B is the answer.
Rishu said:
8 years ago
Is Earth Curvature considered when distance taking more than 250km?
Snehangsu Bag said:
1 decade ago
How answer would be 'B'?
I think answer 'C' would be right.
I think answer 'C' would be right.
Chibi said:
6 years ago
More than 18km, We should consider the curvature of earth.
Atea said:
7 years ago
More than curvature it would be due to refraction.
Dennis Quansah said:
8 years ago
Thanks for the explanation @Sammy.
Dean winchester said:
8 years ago
Yeah, good explanation @Sammy.
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