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).

Q: 8 In a stereo pair, which of the following statements is true (multiple choice questions) A. The…

A: Stereo pair is the pair of photos of same area taken from the aerial survey that are taken at 2…

Q: What is the aeroplane flying height to obtain the average scale of the photograph equal to 1/7200?…

A: Given data: The average scale of the photograph, S = 1/7200 Ground surface elevations vary 160 m to…

Q: To determine the elevation of a detail point, a total station was set up on a traverse station known…

A: orthometric height = 9.456 mreflector with rod = 1.45 mvertical angle = 94.1258 degreehorizontal…

Q: An upright aerial photograph is taken using a camera focal length of 150.7 mm, where there are 2…

A:

Q: A vertical photograph is taken at an altitude of 1200 m 'above mean sea level' (a.m.s.l) of a…

A:

Q: The elevation of point A is at 1200' above sea level. What is the elevation of point B if the flying…

A: Scale (s) = 1200/12000                 = 1/10

Q: If an EDM instrument has a stated accuracy of +-(2mm+3ppm) what error can be expected in a measured…

A: Given data in question  EMD instrument Accuracy Distance To find out  Error

Q: When does the penetrometer classified as a static cone penetrometer?

A: Penetrometer is a device used to determine the penetration resistance and the engineering properties…

Q: A flagpole appears in two successive photographs taken at an altitude of 2,000 m above datum. The…

A: Given that :- Focal length of the camera = f = 120 mm length of the air base = B  = 200 m Parallax…

Q: Calculate the horizontal distance between point A and B if a slope distance of 3,562.15 feet is…

A: The values given  in the question are as follows: Slope distance between A and B(s)=3562.15 ft…

Q: A vertical photograph of a flat area having an average elevation of 250 metres above mean see level…

A:

Q: A drone is equipped with a small format digital camera that has an APS-H sensor (see image) and a…

A: Solution: Given data: f=13 mm =0.013mH=1500m

Photogrammetry

Photogrammetry is a technology of taking measurements of physical objects present in the environment, using photographs. It includes the process of recording and analyzing a three-dimension image in the two-dimension form. Photogrammetry was invented around 150 years ago in 1851 by Aimé Laussedat, he was also known as the father of photogrammetry, but this method was not in use until 50 years after its invention. This method was first used in Germany by Dr. Albrecht Meydenbauer in 1893 who was the director of the Royal Prussian Photogrammetric institute founded by him.