Three hills A, B and C has elevations of 660 m, 625 m and 600 m, respectively. B is in between A and C and is 10 km from A and 12 km from C. a. 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. b. If a 5 m tower is erected on top of B, what would be the height of equal towers to be erected at A and C in order that A, B, and C will be intervisible c. What should be the height of tower to be erected at C so that B and C will be invisible from A

Q: 5. Four hills A, B, C, and D having elevations 247, 236, 314, and 396 respectively. The distance of…

A: Compute the height of tower at A with a clearance of 3 m at C so that a 2 m tower at D will be…

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: A tower is photographed from an elevation of 1000 m above datum. The radial distance measured from…

A: Given: A tower is photographed from an elevation of 1000 m above datum. The radial distance measured…

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: (b) (i) Two points A and B are 1530 m apart across a wide river. The following reciprocal evels are…

A:

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…

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

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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: .(b) If the sensitivity of the bubble tube of a level is 30 of are per division, determine the…

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Q: Two hills 90km apart has elevation of 60m and 200m. What would be the minimum height of the tower…

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,…

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Q: ween two points, A and B is [400+(1.79*10)]m, and these are established along the same direction…

A: Given:- A and B is [400+(1.79*10)]m To find:- The subtended angle read on a subtense bar held at A…

Q: 3) A transit (internal focusing) at point A with a stadia interval factor of 100.85 has a middle…

A: Internal focusing theodolite at A with a stadia interval factor k=100.85 reading at middle=1.65 m…

Q: S 36 deg W is converted to an azimuth of A 206 deg B) 316 deg 306 deg D 216 deg

A:

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

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

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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: star Dubhe was observed at an altitude of 58 53' 22". Hour angle iS 84 80'30". Point B was sighted…

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

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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…

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A:

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

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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…

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

A:

Q: From an instrument set up at point A, the angle of elevation of point B is +16°77' while point C is…

A:

Q: 4. Four hills A, B, C, and D having elevations 247, 236, 314, and 396 respectively. The distance of…

A:

Q: From an instrument set up an object was observed at a distance of 5.4 km away. Neglecting the effect…

A:

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

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

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

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

A:

Q: A theodolite was set up at a station P. The angle of depression to vane 2 m above the foot of a…

A: Given- R.L of P=433.05 m, Staff reading at P=2.905 m, Distance between stations = 20 m, It is needed…

Q: S 36 deg W is converted to an azimuth of

A:

Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.