Photogrammetry Question 3: A tower appears in two successive photographs taken at an altitude of 4000 m above the datum. The focal length of the camera is 160 mm. The parallax for the top and bottom of the pole is 72 mm and 63 mm respectively. If the height of the tower is 25 m then calculate the length of the air base(m).

Photogrammetry Question 3: A tower appears in two successive photographs taken at an altitude of 4000 m above the datum. The focal length of the camera is 160 mm. The parallax for the top and bottom of the pole is 72 mm and 63 mm respectively. If the height of the tower is 25 m then calculate the length of the air base(m).

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q- A vertical photograph of a flat area having an average elevation of 250m above mean sea level was taken with a camera of focal length 25 cm. A section line AB 300 m long in the area measures 15cm on the photograph; a tower BP in the area also appears on the photograph. The distance between images of top and bottom of the tower measures 0.5 cm on the photograph. The distance of the image of the top of the tower is 10 cm. The actual height of the tower is..
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