List of top Photogrammetry Questions asked in GATE GE

Select the CORRECT option(s). Aerial images are prone to external geometric errors due to random movements of the aircraft, which involve changes in ______.

Which of the following statements in the context of aerial photography is/are CORRECT?

The flying height of an aircraft above the base of a building is 500 m. In the nominally vertical aerial photograph, the radial distance from the principal point to the top of the building is 90 mm. The photo size is 230 mm × 230 mm. The relief displacement of the building is 6 mm.
The estimated height of the building is _______ m (Rounded off to the nearest integer).

An oblique aerial photograph of a cricket stadium is taken which includes two linear practice pitches (p and q). The length of both the pitches measured on ground is \( 15\ \text{m} \). The dimension of the image is \( 230\ \text{mm} \times 230\ \text{mm} \), while the photo lengths of p and q are \( 5\ \text{mm} \) and \( 15\ \text{mm} \), respectively.

What are the photo scales for p and q, respectively?

For a camera with focal length \( 150\ \text{mm} \) and a \( 30\ \text{cm} \times 30\ \text{cm} \) format size, what height above ground (in meters) is necessary for a vertical photograph to cover an area of \( 9\ \text{km}^2 \)?

For a proper stereoscopic viewing, the stereopair should be oriented in such a way that the flight line of each photo lies ___________.

A parallax bar can be used to measure ____________ while viewing the two photos stereoscopically.