List of top Geo Informatics Engineering Questions on Photogrammetry asked in GATE GE

A pair of overlapping vertical photographs were taken from a flying height of $1230~\text{m}$ above sea level with a camera having a focal length of $152.4~\text{mm}$. The distance between the consecutive exposure stations is $350~\text{m}$. The parallax bar reading of a point A on the photograph is observed as $10.96~\text{mm}$. The parallax bar constant for this setup is given as $80.71~\text{mm}$. The elevation of point A above sea level is ___________ m (Rounded off to 2 decimal places).

An aerial photograph is to be taken from a flying height of $2~\text{km}$ above a flat ground with a camera having a focal length of $200~\text{mm}$. The image format used is $23~\text{cm} \times 23~\text{cm}$. The ground area covered by a single photograph is \underline{\hspace{1.6cm}} $\text{km}^2$.

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. 

For a constant flying height, the average scale of an aerial photograph depends on which of the following parameter(s)?
Which of the following statement is NOT true regarding relief displacement in vertical photographs in the context of aerial photogrammetry?