An offshore drilling rig is being towed out to sea. What is the maximum distance away that the navigation lights can still be seen by an observer standing at the shoreline? The observer’s eye height is 5'8", and the uppermost navigation light is 230 ft above the water.

Q: An observer fails to check the bubble, and it is off two divisions on a 500-ft sight. What error in…

A: Solution: Given data Error in elevation difference results =10-sec bubble Sight distance=500 ft…

Q: Situation 4] a fishing vessel with a green light on its deck, 7.5 m above the water, disappears from…

A:

Q: The following readings were taken with a level on a 5m staff in a levelling operation from points 1…

A: To Determine 1- Elevation of all points by rise and fall method and apply appropriate check. 2- The…

Q: - The point on the earth's surface vertically above the focus of an earthquake is called D Magnitud…

A: It is asked to answer the point above the focus of the earthquake.

Q: A horizontal angle is measured with a total station in direct reading as 95° 32' 10". Then the angle…

A:

Q: The vertical photograph was exposed with a 60 cm focal length camera at a flying height of 3,000…

A: Given that :- focal length = f =60 cm flying height = H = 3000 m datum height = h = 200 m To…

Q: What should be the height (m) of a lighthouse, so that it can be visible from a distance of 3 km?

A: It has been asked in the question to determine the height of the lighthouse which can be visible…

Q: pleted a level run over a distance of 900 metres, using a suitable el. You have ensured that your…

A: According to given data  You have completed a level run over a distance of 900 metres, using a…

Q: A pilot wants to drop survey markers at remote locations in the Australian outback. If he flies at a…

A: Given data Speed of the aero plane v0=40km/h Distance =? Height of the aero plane h=30 m

Q: Explain the setup process using an instrument with an optical plummet?

A: Total station: Total station instrument is a combination of electromagnetic distance measuring…

Q: A Lighthouse is visible just above the horizon at a certain station at the sea level. The distance…

A: Given that :- Distance between station and light house = D = 38.55 km To calculate the height of the…

Q: Based on the shown table for determining the elevation for set of point, answer the two following…

A:

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

A:

Q: Three stations P, R and Q are along the same plane. Angle of elevation of the top of signal of…

A:

Q: Briefly describe the principles on which seismic refraction studies for subsurface explorations are…

A: Seismic Refraction Studies:

Q: Compute the angular closure error in seconds for a traverse with the interior angles: Angle 1 69° 4'…

A:

Q: Describe how the main force is responsible for slope mass failure and how this foce is affected by…

A: In The above equation it has been said that we have to explain the forces which is responsible for…

Q: A line AB on the photograph measures 10.24 cm for which focal length was 15 cm, the corresponding…

A:

Q: 1. An angle measuring 0.001o is needed to complete half of a revolution. Given these circumstances,…

A:

Q: Using a 1 second theodolite the following clocl traverse. What is the angular closing error and 62°…

A: The traverse angle is given as follows: 163°27' 36" 324°18' 22" 62°39' 27" 330°19' 18" 181° 09' 15"…

Q: A runway at a commercial service airport maintains non-precision instrument procedures with…

A: Given that :-With visibility requirements as low as  mile, a runway at a commercial service airport…

Q: 2)lt is desired to sight from Hill A(elev = 3025.62 m) to Hill B(elev = 3048.91 m) 7 km away.Hill…

A: To Determine Height of tower to be constructed in each of the three cases.

Q: What are the Sample Acres when doing 17% cruise using 1/10 ac fixed plots on 89 acres?

A: The values given in the question are as follow Fixed area of plots=89 acres 17% crsise using…

Q: Hn plane surveying (a) the curvature of the earth is taken into consideration (b) the curvature of…

A: To Determine The Definition of the given type of surveying (Plane surveying).

Photogrammetry

Photogrammetry is a technology of taking measurements of physical objects present in the environment, using photographs. It includes the process of recording and analyzing a three-dimension image in the two-dimension form. Photogrammetry was invented around 150 years ago in 1851 by Aimé Laussedat, he was also known as the father of photogrammetry, but this method was not in use until 50 years after its invention. This method was first used in Germany by Dr. Albrecht Meydenbauer in 1893 who was the director of the Royal Prussian Photogrammetric institute founded by him.