1.

and are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being S and f respectively. Parallax displacement of the point due to relief, is

A. <img src="/_files/images/civil-engineering/advanced-surveying/90-4.120-1.png">
B. <img src="/_files/images/civil-engineering/advanced-surveying/90-4.120-2.png">
C. <img src="/_files/images/civil-engineering/advanced-surveying/90-4.120-3.png">
D. <img src="/_files/images/civil-engineering/advanced-surveying/90-4.120-4.png">
E. .
Answer» D. <img src="/_files/images/civil-engineering/advanced-surveying/90-4.120-4.png">


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