Isocenter
Plumb point
Principal point
None of these
A. Isocenter
Aerial photographs may be either vertical or oblique
Vertical photographs are taken with the axis of camera pointing vertically downward
Vertical photographs are used for most accurate maps
All the above
1°
2°
3°
4°
1600
1615
1630
1650
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
30°
35°
40°
45°
Greater than the longitude of the place
Less than the latitude of the place
Equal to the latitude of the place
None of these
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
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
1°
2°
3°
4°
h tan α/S
h tan β/S
h (tan α + tan β)/S
h (tan α - tan β)/S
4.4 mm
5.5 mm
6.5 mm
7.5 mm
θ = z + δ
θ = δ - z
θ = 180° - (z + δ)
θ = (z + δ) - 180°
Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is usually denoted by the Greek letter γ
Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
All the above
Principal point
Isocenter
Plumb point
Perspective centre
Do not follow any definite mathematical law
Cannot be removed by applying corrections to the observed values
Are generally small
All the above
Its altitude and azimuth
Its declination and hour angle
Its declination and right ascension
All the above
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
Nadir
Isocenter
Principal point
Plumb point
7 h 00 m
7 h 30 m
8 h 00 m
9 h 00 m
sin α = sin φ cosec δ
sin α = sin φ sec δ
sin α = cos φ sec δ
sin α = cos φ cosec δ
sin c sin B
cos c cos B
tan c tan B
sin c cos B
First point of Aeries
First point of Libra
Vernal Equinox
Both (b) and (d) of the above
The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
The difference between the absolute parallax of two points depends upon the difference in their elevations
The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
All the above
Satellite station
Subsidiary station
Pivot station
Main station
Planimetric control
Height control
Both planimetric and height control
None of these
Equator
Celestial equator
Ecliptic
None of these
1 : 10,000
1 : 15,000
1 : 20,000
1 : 30,000
Astronomical latitude
Astronomical co-latitude
Co-declination of star
Declination of star
Triangulation surveying
Astronomical surveying
Hydrographical surveying
Photogrammetric surveying
1 in 12
1 in 10
1 in 8
1 in 6