by DeepWebLabs
GATE-GE SERIES
Geo-informatics-engineering

Photogrammetry

5 previous year questions.

Volume: 5 Ques
Yield: Medium

High-Yield Trend

5
2023

Chapter Questions
5 MCQs

01
PYQ 2023
medium
geo-informatics-engineering ID: gate-ge-
An aerial photograph is to be taken from a flying height of above a flat ground with a camera having a focal length of . The image format used is . The ground area covered by a single photograph is \underline{\hspace{1.6cm}} .
1
5.29
2
1.48
3
0.95
4
2.22
02
PYQ 2023
medium
geo-informatics-engineering ID: gate-ge-

A square grid is laid on a flat terrain and is photographed from an aerial camera. The flying height and camera parameters are assumed to be constant. The camera and lens are assumed to be perfect (i.e. free from any distortions). The image of the grid obtained from the camera is shown below. Select the CORRECT statement from the statements given below.

1
Camera is looking directly downwards (towards nadir)
2
The given photograph is a vertical photograph
3
The given photograph is an oblique photograph
4
Scale over the given photograph is constant
03
PYQ 2023
medium
geo-informatics-engineering ID: gate-ge-

A pair of overlapping vertical photographs were taken from a flying height of above sea level with a camera having a focal length of . The distance between the consecutive exposure stations is . The parallax bar reading of a point A on the photograph is observed as . The parallax bar constant for this setup is given as . The elevation of point A above sea level is ___________ m (Rounded off to 2 decimal places).

04
PYQ 2023
medium
geo-informatics-engineering ID: gate-ge-
For a constant flying height, the average scale of an aerial photograph depends on which of the following parameter(s)?
1
Focal length of the camera
2
Size of the photograph
3
Size of the objects in the area
4
Topography of the ground
05
PYQ 2023
medium
geo-informatics-engineering ID: gate-ge-
Which of the following statement is NOT true regarding relief displacement in vertical photographs in the context of aerial photogrammetry?
1
Relief displacement is the shift in the photographic position of an object caused by the elevation of the object (above or below the datum)
2
Relief displacement is always in non-radial direction from the principal point
3
Relief displacement can cause straight roads (not passing through the ground principal point) to appear crooked in undulating terrain
4
The magnitude of relief displacement is affected by the flying height of the camera (assuming everything else to be same)