1. Measurement of Distances
The chapter focuses on the measurement of distances in surveying, exploring both direct and indirect methods. Direct methods include pacing, the use of passometers and odometers, while indirect methods involve tools like chains and tapes. Additionally, the chapter covers ranging survey lines, the importance of bearings, and various types of magnetic compasses, emphasizing their roles in providing accurate measurements and directions.
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Sections
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What we have learnt
- Horizontal distance measurement is critical in surveying.
- Different tools and methods are utilized for measuring distances with varying accuracy.
- Ranging methods and magnetic bearings play significant roles in survey line establishment.
Key Concepts
- -- Direct Methods
- Methods that physically measure distance straight between two points, such as pacing or using measuring devices.
- -- Indirect Methods
- Techniques used when direct measurement is impractical, relying on additional calculations or tools like tapes and chains.
- -- Bearing
- The direction of a survey line relative to a reference meridian, expressed in degrees.
- -- Ranging
- A process to ensure measurements are taken in a straight line, which can be either direct or indirect depending on visibility.
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