Surveying
The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height ‘H’ is 100 m. If mean photo base is 95.2 mm, the flying height is

10,000 m
14,000 m
8,000 m
12,000 m

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Surveying
Circumpolar stars

Rotate round the celestial pole
Are seldom seen near the pole star
Remain always above the horizon
Rotate round the North Pole

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Surveying
Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
All of these
By subtracting their longitudes if places are in the same hemisphere
By adding their longitudes if places are in the different hemispheres

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