The area is divided into triangular figures
Control stations are located from which detailed surveys are carried out
Sides are not measured excepting the base line
All the above
D. All the above
f/H sec θ
f sec θ/H
f/H
f/H cos ½θ
High oblique
Low oblique
Vertical
None of these
52 m
62 m
72 m
82 m
The sum of the angles around a station should be 360°
The sum of the three angles of a plane triangle should be 180°
The sum of the eight angles of a braced quadrilateral should be 360°
All the above
29 days
29.35 days
29.53 days
30 days
The length of the air base is increased
The scale of the model is altered
y-parallax is not affected
All the above
Hour angle
Azimuth
Right ascension
Declination
fB/(H - h)
fB/(H - h)2
fB/(H + h)
fB/(H + h)2
10° N
50° N Latitude
Equator
5° S latitude
East of observer
West of observer
North of observer
South of observer
The standard meridian
The international date line
That of Greenwich
Both (a) and (c) of above
Planimetric control
Height control
Both planimetric and height control
None of these
Increases as the horizontal distance increases from the principal point
Increases as the ground elevation increases
Decreases as the flying height increases
All the above
Co-declination
Co-latitude
Declination
Latitude
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
When the star momentarily moves vertically
When the angle at the star of the spherical triangle is 90°
When the star's declination is greater than the observer's latitude
All the above
Apparent solar time is measured from the lower transit of the true sun
Mean solar time is measured from the lower transit of the mean sun
Sidereal time is measured from the lower transit of the first point of Aries
Sidereal time is measured from the upper transit of the first point of Aries
h/H f tan θ
h/H f² tan θ
h/H f² sin θ
h/H f cos θ
Length of the equator between their longitudes
Length of the parallel between their longitudes
Length of the arc of the great circle passing through them
None of these
Is a good property
Is a function of tilt
Is not affected by the change of flying height between photographs
Is minimum when θ is 3°
Eastward
Westward
Northward
Southward
Ground elevation
Flying height
Length of air base
All the above
High oblique
Low oblique
Vertical
None of these
S - 90°
S - 180°
S - 270°
S - 360°
The plane passing through the perspective centre of a stereo pair and a ground point, is known as basal plane
Each pair of image points on stereo pair have their own basal plane
Relative orientation means reconstructing the basal plane
All the above
Positive for points above datum
Negative for points below datum
Zero for points vertically below the air station
All the above
Zenith
Celestial point
Nadir
Pole
Every angle is less than two right angles
Sum of the three angles is equal to two right angles
Sum of the three angles less than six right angles and greater than two right angles
Sum of any two sides is greater than the third
sin λ
cos λ
tan λ
cot λ
Parallel to the principal line
Perpendicular to the principal line
Along the bisector of the angle between the principal line and a perpendicular line through principal plane
None of these