Objective of Lesson 22

Measurment of Direction using Theodolite

• Measurment of Horizontal Angle
  • Horizontal angle measurement by method of Repetition
  • Horizontal angle measurement by method of Reiteration
• Measurment of Vertical Angle
• Setting out Direction of a Line in Field

Errors in Measurment of Angle

• Instrumental Errors
• Personal Errors
• Errors due to Natural Causes
• Elimination of Errors

Mistakes in Theodolite Observation

Exercise 22

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