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.

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.

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

See similar textbooks

Similar questions

The vertical photograph was exposed with a 60 cm focal length camera at a flying height of 3,000 meters above datum. What is the photo scale at point a if the elevation of point A on the ground is 200 m above datum?
A photogrammetric survey uses photographs taken with specially designed cameras from where? O a. airplanes or ground stations O b. a field or a laboratory equipment O c. the ground surface or underwater O d. a ship or elevated ground station
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
Discuss briefly the advantages of plane table survey.
The primary aims of field surveying Select one: a. -to find out Absolute direction b. -to find out the Relative angles of lines c. -to find out Absolute angles d. - none of the answers
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 110.000 at ground elevation of 400 m above the datum. Focal length of camera used is 20 cm and size of photographs are 23 cm x 23 cm. 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
Q2/ In field work, vertical angles was measured from station A to stations B.C, as show in table below, if the height of instrument at point A is (1.3m) and the elevation at same point is (25m), calculate the elevations of others points if know the horizontal distances for points B, C, are 80, 120, m respectively. station Observed point Vertical angle F.L F.R B 97° 27 50" 262° 32 36" 93° 27 14" 266° 32 18"
The elevation of points O and a is 267ft, that of point is Band Cis 52 4ft and that of D is 820ft 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 bc and at point d ,expressing each scale as a number of feetcorres ponding to 1 inch,
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,
GEFS-CE11- FIELDWORK No.4 The next field work is determining vertical distances of selected points on the ground surface through the use of a leveling instrument. For the reason that there is no instrument available at your home, I will provide a data for you to work on. Do the computation by showing the complete solution on paper, fill up the table in the manual, and draw an approximate figure showing the series of observation from BMg to BM10. DIFFERENTIAL LEVELING DATA: From the fieldnotes below, determine the elevation of BM10 and Do the arithmetic Check. STATION B.S H.I. F.S. ELEV REMARKS BM8 1.40m 199.65 m TP1 1.35m 1.55m TP2 1.27m 1.48m ТРз 1.29m 1.48m TP4 0.55m 1.78m BM9 1.40m 1.50m Ramp TP5 1.45m 1.33m TP6 1.48m 1.28m TP7 1.27m 1.36m ТРв 1.50m 1.28m TP9 1.41m 1.11m BM10 1.42m
) On a truly vertical aerial photograph, whose focal length is 100.00 mm, the base ofthe corner of a vertical building appears 50.00 mm from the principal point. The top of thesame corner of the building is measured to the 51.00 mm from the principal point. It has 2been determined that the flight altitude of the camera above the ground at the base of thebuilding is 8000.0 ft. What is the height of the building?