If the general ground level of any area is 10% of the flying height, the princip

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If the general ground level of any area is 10% of the flying height, the principal points may be used as the centres of radial directions for small scale mapping even in tilted photograph up to
Options
A. 1�
B. 2�
C. 3�
D. 4�

Correct Answer

3�

Advanced Surveying problems

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1. The correction applied to the measured base of length L is
Options
A.
B. where w is the weight of tape/m
C. where h is height difference of end supports
D. Reduction to mean sea level =
E. all the above.

4. Pick up the correct statement from the following :
Options
A. Refraction correction is zero when the celestial body is in the zenith
B. Refraction correction is 33' when the celestial body is on the horizon
C. Refraction correction of celestial bodies depends upon their altitudes
D. all the above.

5. The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called
Options
A. visible horizon
B. sensible horizon
C. celestial horizon
D. true horizon
E. none of the above.

8. The position of a heavenly body on the celestial sphere can be completely specified by
Options
A. its altitude and azimuth
B. its declination and hour angle
C. its declination and right ascension
D. all the above.

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