1. Plane Tabling
Plane tabling is a traditional survey method used for creating maps directly in the field. It allows for simultaneous observations, mapping, and contouring but has become largely obsolete with the advent of modern surveying technologies like GPS and Total Stations. The theodolite is highlighted as a versatile instrument for measuring angles and levels, with various types including electronic models that enhance precision in survey work.
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What we have learnt
- Plane tabling involves creating maps in the field with minimal office work.
- The advantages of plane tabling include real-time visualization of terrain, while disadvantages include reliance on weather conditions.
- The theodolite can measure both horizontal and vertical angles, essential for accurate surveying.
Key Concepts
- -- Plane Table
- A wooden drawing board used for mapping directly in the field.
- -- Theodolite
- An instrument used in surveying to measure angles and levels.
- -- Radiation Method
- A plane tabling method utilizing distance and direction from a station to locate objects.
- -- Intersection Method
- A technique in plane tabling to locate objects by measuring directions from two different stations.
- -- Vernier Theodolite
- A commonly used theodolite for accurately measuring horizontal and vertical angles.
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