Aerial photography is to be taken of a tract of land that is X-mi square. Flying height will be H ft above average terrain, and the camera has focal length f. If the focal plane opening is 9 x 9 in., and minimum sidelap is 40%, how many flight lines will be needed to cover the tract for the data given below? X = 9; H = 4100 ft; f = 152.40 mm Express your answer as an integer. [5] ΑΣΦ. 41 vec ?

Aerial photography is to be taken of a tract of land that is X-mi square. Flying height will be H ft above average terrain, and the camera has focal length f. If the focal plane opening is 9 x 9 in., and minimum sidelap is 40%, how many flight lines will be needed to cover the tract for the data given below? X = 9; H = 4100 ft; f = 152.40 mm Express your answer as an integer. [5] ΑΣΦ. 41 vec ?

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter14: Highway Surveys And Location

Section: Chapter Questions

Problem 5P

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Aerial photography is to be taken of a tract of land that is X-mi square. Flying height will be H ft above average terrain, and the camera has focal length f. If the focal plane opening is 9 x 9 in., and minimum sidelap is 30%, how many flight lines will be needed to cover the tract for the data given below? ▼ Part A X = 8; H=4500 ft; f = 152.40 mm Express your answer as an integer. 9F 57 Submit ΑΣΦ vec Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining ?
On a vertical photograph of flat terrain, section corners, which are a nominal 1-mi apart, appear a distance d apart. If the camera focal length is f, compute flying height above average ground in feet for the following data: Part A d = 3.319 in.; f = 3-1/2 in. Express your answer in feet to four significant figures. H = Submit Part B 15| ΑΣΦ H = Request Answer d = 68.14 mm; f = 156.4 mm Express your answer in feet to five significant figures. Submit vec 5 IVE ΑΣΦ41 | vec Request Answer ? ? ft ft
Aerial photography is to be taken of a tract of land that is X-mi square. Flying height will be H ft above average terrain, and the camera has focal length f. If the focal plane opening is 9 x 9 in., and minimum sidelap is 40%, how many flight lines will be needed to cover the tract for the data given below? X = 9; H = 4100 ft; f = 152.40 mm Express your answer as an integer. —| ΑΣΦ. 41 | vec 100 Pre ?
C) A 20-mile strip of terrain is to be photographed for highway mapping. The aerial camera to be used has a lens of focal length 12 in and takes 9×9 inches photographs. The ground elevation varies from a low of 800.00 ft to a high of 1050.00 ft above mean sea level. The plane has to make one flight line and the average width of the photographic coverage is to be 1650.00 ft. What will be the average scale of the photographs? What flying height, above mean sea level, should be used for this flight? If it is specified that the overlap (end lap) between photos be 60% and that 2 extra exposures be added at each end of the flight line, find how many photographs will be required.
A section line AB appears to be 10.16 cm on a photograph for which the focal length is 16 cm. The corresponding line measures 2.54 cm on a map, which is to a scale 1 The terrain has an average elevation of 200 m above mean sea level. The flying 50,000 altitude of the aircraft above mean sea level during photograph will be (a) 1800 m (c) 2200 m (b) 2000 m (d) 2400 m q22
Calculate the flight height above average terrain that is required to obtain vertical photographs at an average scale of S' if the camera focal length is f for the following data: Part A S = 1:18, 000; f = 152.40 mm Express your answer in feet to three significant figures. H = Submit Part B H = 197| ΑΣΦ 41 Submit Request Answer S = 1 : 4800; f = 95.90 mm Express your answer in feet to three significant figures. |5| ΑΣΦΑ vec Request Answer vec www www ? ? ft ft
Q4/ Assume that a vertical photograph was taken at a flying height of 5000 m above sea level using a camera with a 152-mm-focal-length lens. (a) the photo scale at points A and B was 1:30000 and B was 1:25000. (a) Determine elevations of A and B ? (b) What ground distance corresponds to a 20.1-mm photo distance measured at each of these elevations.
Determine the horizontal distance between two points A and B whose elevations above datum are hA = 1840 ft and hB = 1425 ft and whose images a and b on a vertical photograph have photo coordinates xa = 2.95 in., ya = 2.32 in., xb = -1.64 in., and yb = -2.66 in. The camera focal length was 152.4 mm and the flying height above datum 7900 ft . Express your answer in feet to four significant figures.
An area of 10 km x 20 km is to be surveyed using aerial photogrammetry Average scale of photograph is 1:10,000 at ground elevation of 400 m above the datum. Focal length of camera used is 20cm and size of photographs are 23cm x 23cm. The speed of aircraft is 270 kmph. The forward lap in photographs is 70% and side lap is 30% Determine the flying height, exposure interval and number of photographs required to complete the survey.
When conducting traverse surveys, what are the two laws that are often used to correct the misclosure of the vertical and horizontal distances? (Check) 2 (multiple choice questions) □ A. Theodolite law, suitable for distance and angle accuracy B. Compass rule, suitable for distance measurement accuracy far worse than angle measurement accuracy C. Compass law, suitable for distance and angle accuracy □ D. Theodolite law, suitable for distance measurement accuracy far worse than angle measurement accuracy
The elevation of points L is 260ft, that of point is k is 300ft and point M is 800ft, that of point is N is 520ft the flying height above sea level is 1769ft and the focal length of the camera is 8.23 inch determine the scale of the photograph along the line ao along the be and at point d, expressing each scale as a number of feetcorres ponding to 1 inch,
Compare the scales of photography for the area recorded and the strip widths given by cameras A and B at the same flying heights. Camera A Camera B Format 180 mm x 180 mm 230 mm x 230 mm Focal length 210 mm 150 mm How many photographs would be taken by the camera A in covering a strip 16 km long at a flying height of 1350 m? The longitudinal overlap is 60%.