Fill in the blanks/identification: A detailed engineering alignment study for a proposed by pass road project in Cagayan requires the aerial photography of a 20km x 1km straight strip of predominantly rice land. Specifications include camera format: 23cm x 23cm, focal length: 152.4 m and forward overlap: 60% of format. (Note: Limit your answers up to 2 decimal places only and provide the unit of measurement) A. If the photography specifications further require that 90% of the format wide must fit the strip width for the generation of orthophoto maps, determine the average flying height, in meters of the aerial photography. B. If two photographs are exposed at each end of the project area to stereoscopic coverage, determine the total number of photographs. C. For photogrammetric plotting, determine the approximate total area covered by the stereoscopic models, in hectares.

Fill in the blanks/identification: A detailed engineering alignment study for a proposed by pass road project in Cagayan requires the aerial photography of a 20km x 1km straight strip of predominantly rice land. Specifications include camera format: 23cm x 23cm, focal length: 152.4 m and forward overlap: 60% of format. (Note: Limit your answers up to 2 decimal places only and provide the unit of measurement) A. If the photography specifications further require that 90% of the format wide must fit the strip width for the generation of orthophoto maps, determine the average flying height, in meters of the aerial photography. B. If two photographs are exposed at each end of the project area to stereoscopic coverage, determine the total number of photographs. C. For photogrammetric plotting, determine the approximate total area covered by the stereoscopic models, in hectares.

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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Concept explainers

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.

Question

Fill in the blanks/identification:
A detailed engineering alignment study for a proposed by pass road project in Cagayan requires the aerial photography of a 20km x 1km straight strip of
predominantly rice land. Specifications include camera format: 23cm x 23cm, focal length: 152.4 m and forward overlap: 60% of format. (Note: Limit your
answers up to 2 decimal places only and provide the unit of measurement)
A If the photography specifications further require that 90% of the format wide must fit the strip width for the generation of orthophoto maps, determine the
average flying height, in meters of the aerial photography.
B. If two photographs are exposed at each end of the project area to stereoscopic coverage, determine the total number of photographs.
C. For photogrammetric plotting, determine the approximate total area covered by the stereoscopic models, in hectares.

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A drone is equipped with a small format digital camera that has an APS-H sensor (see image) and a focal length of f = 13 mm. The flying height H’ over an approximately flat terrain is 1500 m. Two stereopairs are to be captured with 65% overlap at the same flying height. See example image below. What is the area of overlap on the ground in square meters?
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