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Theodolite surveying part1

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Naufil Sayyad
Naufil Sayyad

This document discusses theodolite surveying. It defines a theodolite as an instrument used to accurately measure horizontal and vertical angles. The document outlines the components of a theodolite and different types including transit, non-transit, vernier, micrometer, digital/electronic, and optic theodolites. It also defines various technical terms used in theodolite surveying such as swinging, transiting, face left, face right, and changing face. The main uses and functions of a theodolite are to measure horizontal and vertical angles, magnetic bearings, deflection angles, horizontal distances, and elevations.

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2.THEODOLITE SURVEYING (24 MARKS) By Mr. Naufil Sayyad
Course outcome ( CO) b. Prepare plans using Theodolite surveys.
Practical outcomes ( PrOs) 7.Use transit theodolite to measure Horizontal angle correctly by direct method 8.Use transit theodolite to measure Vertical angle correctly by direct method 9.Use transit theodolite to measure Horizontal angle correctly by Repetition method 11.Use transit theodolite to carry out survey project for closed traverse for minimum 5 sides
Unit outcomes ( UOs) 2a. Explain the given components of the transit theodolite 2b.describe the salient features and relationship between the given fundamental axes 2c.Describe the procedure to measure horizontal and vertical angles using theodolite for the given situation 2d.Apply checks for determining the type of traverse using the given data 2e.Compute latitude, departures , consecutive coordinates, Independent coordinates from given data
2f.select relevant method of theodolite traversing for given condition 2g.apply Bowditchs rule and transit rule to balance the traverse for given data 2h.Tabulate Gales Traverse table for the given data Unit outcomes ( UOs)
Introduction Theodolite is an intricate instrument used mainly for accurate measurement of horizontal and vertical angles up to 10 to 20 depending upon the least count of the instrument. Because of its various uses the Theodolite is sometimes known as Universal instrument.
Uses of Theodolite 1. Measurement of Horizontal angle 2. Measurement of vertical angle 3. Measurement of magnetic bearing of a line 4. Measurement of Deflection angle 5. Measuring the horizontal distance between two points 6. Finding the vertical height of an object 7. Finding difference of elevations between various points 8. Ranging a line
Types of Theodolite Based on type of telescope Theodolite Transit Non Transit
Types of Theodolite Based on reading unit Theodolite Vernier Micrometer Digital/Electronic
Vernier Theodolite Digital/Electronic Theodolite Micro Optic Theodolite
Component parts of Theodolite
Telescope Altitude bubble Vertical Clamping screw Trunnion axis
Vertical Circle Eye piece Plate level Upper plate Vernier A/B Lower Plate Inner spindle Outer spindle20
Tribrach Levelling screw Trivet
Theodolite surveying part1
Technical terms Swinging It indicates turning the telescope in the horizontal plane. It is called Right swing when telescope is turned clockwise and left swing when telescope is turned anticlockwise.
Technical terms Transiting The method of turning the telescope about its horizontal axis in a vertical plane through 180属 is termed as transiting. In other words transiting results in change in face.
Technical terms Face left Face left means the vertical circle of the theodolite is on the left of observer at the time of taking readings. The observation taken in the face left position is called as face left observation
Technical terms Face Right Face right means the vertical circle of the theodolite is on the right of observer at the time of taking readings. The observation taken in the face right position is called as face right observation.
Technical terms Changing face The operation of bringing the vertical circle from one side of the observer to other is called as Changing face.

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Theodolite surveying part1

  • 2. Course outcome ( CO) b. Prepare plans using Theodolite surveys.
  • 3. Practical outcomes ( PrOs) 7.Use transit theodolite to measure Horizontal angle correctly by direct method 8.Use transit theodolite to measure Vertical angle correctly by direct method 9.Use transit theodolite to measure Horizontal angle correctly by Repetition method 11.Use transit theodolite to carry out survey project for closed traverse for minimum 5 sides
  • 4. Unit outcomes ( UOs) 2a. Explain the given components of the transit theodolite 2b.describe the salient features and relationship between the given fundamental axes 2c.Describe the procedure to measure horizontal and vertical angles using theodolite for the given situation 2d.Apply checks for determining the type of traverse using the given data 2e.Compute latitude, departures , consecutive coordinates, Independent coordinates from given data
  • 5. 2f.select relevant method of theodolite traversing for given condition 2g.apply Bowditchs rule and transit rule to balance the traverse for given data 2h.Tabulate Gales Traverse table for the given data Unit outcomes ( UOs)
  • 6. Introduction Theodolite is an intricate instrument used mainly for accurate measurement of horizontal and vertical angles up to 10 to 20 depending upon the least count of the instrument. Because of its various uses the Theodolite is sometimes known as Universal instrument.
  • 7. Uses of Theodolite 1. Measurement of Horizontal angle 2. Measurement of vertical angle 3. Measurement of magnetic bearing of a line 4. Measurement of Deflection angle 5. Measuring the horizontal distance between two points 6. Finding the vertical height of an object 7. Finding difference of elevations between various points 8. Ranging a line
  • 8. Types of Theodolite Based on type of telescope Theodolite Transit Non Transit
  • 9. Types of Theodolite Based on reading unit Theodolite Vernier Micrometer Digital/Electronic
  • 11. Component parts of Theodolite
  • 13. Vertical Circle Eye piece Plate level Upper plate Vernier A/B Lower Plate Inner spindle Outer spindle20
  • 16. Technical terms Swinging It indicates turning the telescope in the horizontal plane. It is called Right swing when telescope is turned clockwise and left swing when telescope is turned anticlockwise.
  • 17. Technical terms Transiting The method of turning the telescope about its horizontal axis in a vertical plane through 180属 is termed as transiting. In other words transiting results in change in face.
  • 18. Technical terms Face left Face left means the vertical circle of the theodolite is on the left of observer at the time of taking readings. The observation taken in the face left position is called as face left observation
  • 19. Technical terms Face Right Face right means the vertical circle of the theodolite is on the right of observer at the time of taking readings. The observation taken in the face right position is called as face right observation.
  • 20. Technical terms Changing face The operation of bringing the vertical circle from one side of the observer to other is called as Changing face.