By subtracting their longitudes if places are in the same hemisphere
By adding their longitudes if places are in the different hemispheres
By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
All the above
C. By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
April 15
June 14
September 1
All the above
h/H f tan θ
h/H f² tan θ
h/H f² sin θ
h/H f cos θ
Once
Twice
Thrice
Four times
Reduction to mean sea level
Correction for horizontal alignment
Correction for slope
All the above
One degree of longitude has greatest value at the equator
One degree of longitude has greatest value at the poles
One degree of longitude has the same value everywhere
One degree of latitude decreases from the equator to the poles
52 m
62 m
72 m
82 m
1000 km
800 km
600 km
500 km
80°
70°
60°
40°
May have tilt up to 30°
May include the image of the horizon
May not include the image of the horizon
None of these
58 cot α
58 tan α
58 sin α
58 cos α
Control points for surveys of large areas
Control points for photogrammetric surveys
Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
All the above
Do not follow any definite mathematical law
Cannot be removed by applying corrections to the observed values
Are generally small
All the above
If the applied tension to the tape is more than the standard, the tension correction is positive
If the applied tension to the tape is less than the standard, the tension correction is negative
If the temperature during measurement is greater than the standard temperature, the temperature correction is positive
All the above
Co-declination
Co-latitude
Declination
Latitude
L.M.T. - East longitude in time
L.M.T. + East longitude in time
L.M.T. - West longitude in time
None of these
One minute arc of the great circle passing through two points
One minute arc of the longitude
1855.109 m
All the above
f tan θ
f sin θ
f cot θ
f cos θ
Observation equation
Conditional equation
Normal equation
None of these
When its altitude is maximum
When its azimuth is 180°
When it is in south
All the above
The principal point coincides with plumb point on a true vertical photograph
The top of a hill appears on a truly vertical photograph at greater distance than its bottom from the principal point
The top of a hill is represented on a vertical photograph at larger scale than the area of a nearby valley
All the above
Opposite corners of a photograph
Nodal points of the camera lens
Corresponding points on the ground and photograph
Plumb points of stereo pair of photographs
Zenith
Celestial point
Nadir
Pole
8,000 m
10,000 m
12,000 m
14,000 m
Positive for points above datum
Negative for points below datum
Zero for points vertically below the air station
All the above
Mean sun
First point of Aries
First point of Libra
The polar star
The direction of the vertical, the axis of rotation of the instrument
The direction of the poles of the celestial sphere
The direction of the star from the instrument
All the above
Latitudes north of the equator are taken as positive
Latitudes south of the equator are taken as negative
Longitudes east of Greenwich are taken as negative
Longitudes west of Greenwich are taken as positive
58 mm
60 mm
62 mm
64 mm
In truly vertical photographs without relief angles are true at the plumb point
In tilted photographs without relief, angles are true at the iso-centre
In tilled photographs with relief, angles are true at the principal point
None of these
Westward from the first point of Libra
Eastward from the first point of Aeries
Westward from the first point of Aeries
Eastward from the first point of Libra