Three hills, A, B and C, have elevations of 660 m., 630 m., and 600 m., respectively. B is in between A and C and is 10 km from A and 12 km from C. Considering the effect of curvature and refraction correction, what is the clearance or obstruction of the line of sight at B considering that C is visible from A?

Q: 1. Three hills A, B, and C are at elevations 135m, 146m, and 154m respectively above sea level.…

A: given data, elevation of A = 135 m elevation of B = 146 m elevation of C = 154 m distance between A…

Q: The ratio of curvature effect to that of refraction is (a) 3 (c) 19 (b) 12 (d) 7

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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: The ratio of curvature effect to that of refraction is (a) 3 (c) 19 (b) 12 (d) 7

A: Curvature Correction :- It is the vertical distance between the line of sight and the level line at…

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A: Given Distance = 1181.7m = 1.1817km

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: What will be the level difference between the points A and B if curvature and refraction effects are…

A:

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

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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.

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A: To find the minimum height-

Q: Point A is between point B and C. The distance of B and C from Point And are1200 m and 2000m,…

A: Introduction- Curvature causes the points to look lower than they are, while refraction causes them…

Q: The cuvature and refraction effects are taken into account in the following case: Level is set-up…

A: Given- Level at A- Staff at B- R.L of A=150.000 m, Height of instrument at A HIA=1.000 m, Reading of…

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: Compute the refraction error for a distance .1718.1 m

A:

Q: Four hills A, B, C and D are in straight line. The elevations are A = 247 m., B = 236 m., C = 314…

A: Given: Elevation of A = A = 247 m. Elevation of B = 236 m Elevation of C = 314 m Elevation of D =…

Q: A theodolite is set up at station A. The RL of instrument axis is 212,250 m. The angle of elevation…

A:

Q: ELABORATE Three hills A, B, and C are at elevations 135m, 146m, and 154m respectively above sea…

A: h1= 2.5m

Q: Point A is in between points B and C. the distance of B and C are 2000 m and 3000 m, respectively.…

A:

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Q: An instrument is set-up at point M and vertical angles are observed at N -21º15' and O +33º45'. The…

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A:

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Q: The observed altitude of B-ursae Minoris at lower and upper culminations are 29°58′15" and 60°453"…

A:

Q: 5) A person is looking to the horizon, sees a building of height 25 m. What is the least height of…

A: when the refraction is consideredthe height of the buildingC=25 mthereforedistance visible to…

Q: Situation 2] Point B is 628.42 m from A and 724.92 m C. With a leveling instrument set up at point…

A: Cc1 (correction due to curvature & refraction between B & A) = -0.0673DBA2 =…

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

A:

Q: 4. THREE HILLS A,B,& CHAS ELEVATIONS OF 660m, 625m & 600m RESPECTIVELY. B IS IN BETWEEN A & C AND IS…

A: In leveling site, the correction of curvature and refraction is obtained by using the hypothetical…

Q: oint A is between points B and C. The distances of B and C from point A are p00 m and 2000 m,…

A: Elevation difference between B and C =44.4m  To find angle of elevation of point C

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

A:

Q: The top of the tower signal at B which is 2km away from A was sighted through a transit with…

A:

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

A:

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.