Horizontal stadia sights. An automatic level with an internal focusing telescope was set up somewhere at mid-length of a long-span steel bridge. The rod readings tabulated below were observed on s stadia rod held successively at the vicinity of the concrete abutments in the southern and northern approaches of the bridge. If the stadia interval factor of the instrument is 97.5, determine the length of the bridge HAIR READINGS ROD POSITION Upper Middle Lower At southern approach 2.98 1.68 0.38 At northern approach 3.54 2.02 0.49 Length of the bridge: in meters

Q: The height of instrument method of reducing levels is preferred when there are large numbers of…

A: The height of instrument method of reducing levels is used commonly in contour surveys where there…

Q: ➤ The following observations were recorded when carrying stadia level between two temporary bench…

A: First, we need to understand the problem and the data given. We are given the back sight, fore…

Q: A stadia measurement was undertaken with a theodolite having an internal focusing telescope and…

A:

Q: Find out the deflection angles from the following observations Lines AB BC Bearing N 42° 20' E N 30°…

A: Given data  Angle at A for line AB (θAB) =N42°20'E Angle at B for line BC (θBC)  = N30°00'E  Find…

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: The upper and lower stadia hair readings on a stadia rod held at station B were observed as 3.50 and…

A: Given:- The upper and lower stadia hair readings on a stadia rod held at station B = 3.50 m and 1.00…

Q: The instrument used was a transit with an internal focusing telescope and a stadia interval factor…

A: Solution: θ1=-14°45'l1=kSACosθ1l1=99×1.82×Cos-14°45'l1=179.24H1=l1Cosθ1H1=168.5…

Q: Find out the deflection angles from the following observations Lines AB BC Bearing N 42° 20' E N 30°…

A: Deflection angle=42°20'-30°00'                              =12°20' L

Q: Find out the deflection angles from the following observations Lines AB BC Bearing N 42° 20' E N 30°…

A: Given data in question  Bearings  To find out  Deflection angle

Q: The following consecutive readings were taken with a leveling instrument at intervals of 25 m.…

A: There are two methods of solving this problem. 1.Height of instrument method (HI method) 2.…

Q: Question 2 (2) The azimuth from Pt 10 to Pt 1 is 348° 30'. The Azimuth from Pt 1 to Pt 2 is 327°…

A: Given that....

Instruments for Surveying

Surveying is the practice that determines the relative three-dimensional positions of many different points on the earth’s surface. There are various instruments used in Surveying like Theodolites, Total station, Tripod stands, Plane table, etc. for measuring horizontal angle, vertical and sloping angle, which are very useful for giving accurate and precise measurement.