Equations and conversions that will be found useful: h d dp P+dp ; V= 2f 2H B li
ID: 1765377 • Letter: E
Question
Equations and conversions that will be found useful: h d dp P+dp ; V= 2f 2H B linear advance) 0.4G linch- 2.54 cm; 1 foot 12 inch; 1 foot 0.3048 m, 1 m 1,000,000 um 4) Suppose there is a woodlot in a shape of a 45x45 km square of which we would like to H be take a block of stereo photos overlapping by a 60% end lap. All flight lines will be flown parallel to one of the sides of the woodlot. The employed camera contains a 35x35 mm sensor and our targeted Ground Sampling Distance means that the images will need to be taken at a 1:35,000 sensor scale. Suppose further that each captured aerial photo is printed out at a 1:10,000 photo scale. How many printed photos will there be per one flight line?Explanation / Answer
Given data:
Area=45 kmx45 km
Sensor=35mmx35mm
End lap=60%
Sensor scale=1:35000
photo scale=1:10000
It is given that, the flight lines are going to be paralell
Determine the ground coverage:
Ground coverage=0.035/1/10000=350 m on a side
Determine ground seperation between photos on a line for 40% (60% end lap)
=0.4x350=140m between photo centers
Assuming an average aircraft speed of 160 kmph the time between exposure is
140m/photo/160 km/hrx3600/1000=3.15 sec (use 3 sec)
Recalculate the distance between photo centers
=3x160x1000/3600
=133.33
Compute the number of photos per 45 km line dividing this length by the photo advance and add one photo to each end
=45000m/line/133.33m/photo+1+1
=340 (rounded off to nearest integer)
Total number of photos=340 per flight line
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.