A woman standing on a beach can just see the top of a lighthouse 25 km away. If her eye height above sea level is 1.65 m, determine the height of the lighthouse above sea level. Taking into account the effects of curvature and refraction.

Q: A man's eyes 1.75 m. above sea level can barely see the top of a lighthouse which is at a certain…

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Q: The observed altitude of ß-ursae Minoris at lower and upper culminations are 29° 58'15" and 60°…

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Q: A pole cast a shadow 15 m long when the angle of elevation of the sun is 63°. If the pole leans 15°…

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Q: Due to earth's curvature and light refraction, Yeri's eye sight can barely see the top of the SM…

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Q: 60-Light of wavelength 620nm falls on a double slit system immersed in water. It may form an…

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Q: Problem: For the shaded area shown, determine the moment of inertia about a. centroidal Y-axis b.…

A: Moment Of Inertia: Moment of inertia is the quantity represented by the body which resist the…

Q: A tall tower was photographed from an elevation of 700 m above the datum. The radial distances of…

A: Given- Flying Height of the aircraft H=700 m, Radial distance r1=112.50 m & ro=82.40 m,…

Q: The combined effect of the earth's curvature and refraction on a level sight of 1200 m is

A: Given data : Distance (D)=1200 mThe correction due to refraction is 1/7 of correction due to…

Q: Q-If the spacing between stadia hair and horizontal crosshair in the diaphragm of a tachometer is…

A: Given- Distance between stadia hair and horizontal crosshair d=1.2 mm, focal length f=24 cm,…

Q: Compute the error of curvature and refraction of a distance 1459.92 m

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Q: In a vertical photograph taken from an altitude of 2800 m, a chimney of height 100 m, appears at a…

A: Altitude (H): 2800 mChimney height (h): 100 mDistance of chimney image from principal point (r): 80…

Q: Three hills A, B and C has elevations of 660 m, 625 m and 600 m, respectively. B is in between A…

A: Given:- The elevations of hill A = 660 m  The elevations of hill B = 625 m  The elevations of hill C…

Q: A transit is set up at point B which is between A and B. The vertical angle observed towards A is…

A: Measurement or measurement is a branch of testing, the object of which is to establish or verify or…

Q: Question- Calculate the combined correction for curvature and refraction for a distance of 3 km in…

A: Given- distance d=3 km, It is needed to find the combined correction in m.

Q: The combined correction due to curvature and refraction (in m) for distance of 1 km on the surface…

A: Given data: Distance, D = 1 m (on the surface of earth).

Q: Compute the refraction error for a distance 1226.3 m. red

A: Given that,  Distance d = 1226.3 m                   d= 1.2263 Km To calculate refraction error (Cr)…

Q: The top of a tower signal at B, 2,000 m from A away was sighted through a transit with recorded…

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Q: Points a, b, and c have mean sea elevation of 660 m, 626 m, and 600 m, respectively. meanwhile,…

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Q: Question The focal length of the object glass of a tacheometer is 200 mm, the distance between the…

A: Tacheometer surveying-Middle staff intercepts, s = 2 Spacing, i = 4 mmFocal length, f = 200 mm.The…

Q: a) What is the 1st critical angle of incidence required to remove your refracted Longitudinal wave…

A: Note: As per the guidelines of Bartleby only solution of problem (a) is provided. Snell's Law:…

Q: The top of a tower signal at B, 2,000 m from A away was sighted through a transit with recorded…

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Q: 5. Point A is between points B and C. The distances of B and C from point A are 1500m and 2600m…

A: Given data  Distance between A and B (D1) = 1500 m = 1.5 Km  Distance between A and C (D2) = 2600 m…

Q: Point A is in between points B and C, the distances of B and C from B and C from point A are 1000m…

A: given data B and C from point A are 1000m and 2000m respectively  The angle of elevation of point B…

Q: -670 m hi= 1.54 m 34.34 m r= 1.87 m. A

A: It is required to find the elevation of A given the elevation of B is 86.53 m Distance between A and…

Q: What is the elevation of point A in the below figure, if you know that the elevation of point B is…

A: The instrument is at point B Elevation of point B = 92.155 m The height of the instrument, hi = 1.54…

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: Q.4 The captain of a ship standing on the deck, just sees a lighthouse of height 64 m above MSL. If…

A: Given- Height of lighthouse h1=64 m, Height off captain's eye level above MSL h2=9 m,

Q: The combined correction for curvature and refraction for a distance of 3400 m will be nearly 0.2 m…

A: Given data : Distance (d)=3400 m

Q: ng reciprocal levels are taken with one level: Level at Readings on A 2.165 3.810 0.910 2.355 -…

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Q: ?What is the elevation of point A in the below figure, if you know that the elevation of point B is…

A: Given Elevation of point B = 92.108 m we have to find elevation of point A

Q: Q- A vertical photograph of a flat area having an average elevation of 250m above mean sea level was…

A: Using formula for relief displacement

Q: A theodolite is set up at station A. The RL of instrument axis is 212.250 m. The angle of elevation…

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

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Q: A vertical photograph of a flat area having an average elevation of 250 m above mean sea level was…

A: Given data- Average elevation havg=250 mfocal length f=25 cmsection line AB 300 m appears 15 cm on…

Q: Three hills A, B and C has elevations of 660 m, 625 m and 606 meters respectively. B is in between A…

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Q: Question- The combined correction due to curvature and refraction (in m) for a distance of 1 km on…

A: Distance d = 1 km,   It is needed to find the combined correction due to curvature & refraction.

Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.