Surveying
The angle between the axis of earth and the vertical at the station of observation is called

Astronomical latitude
Co-declination of star
Declination of star
Astronomical co-latitude

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Surveying
Pick up the correct statement for horizontal photographs.

The lines parallel to the negative plane are projected as parallel lines
Parallel lines do not appear parallel in central projection
All listed here
The two sides of a road meet at the vanishing point

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Surveying
Systematic errors

Are also known as cumulative errors
Can be removed by applying corrections to the observed values
All listed here
Always follow some definite mathematical law

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