Civil Engineering :: Surveying
- Contour interval is
- If ‘f’ is the focal length of the camera lens and ‘θ’ is the angle of tilt, the distance of the plumb point from the principal point will be
- Pick up the incorrect statement from the following. In a spherical triangle
- If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be
- The process of turning the telescope about the vertical axis in horizontal plane is known as
- For mapping any country
- In the prismatic compass
- If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is
- The permissible error in chaining for measurement with chain on rough or hilly ground is
- The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as
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A.
Geodetic triangulation of greatest possible sides and accuracy is carried out |
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B.
Primary triangles are broken down into secondary triangles of somewhat lesser accuracy |
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C.
Secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys |
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D.
All the above |