dear aspirants, today i will provide you the Surveying topic material is known as chain surveying, chain surveying studymaterial 2020
in this Chain Surveying class we discuss data
1. Accessories used in Chain survey
(i) Chain
(ii) Tape
(iii) Ranging Rods
(iv) offset rod
(v) Cross staff
(vi) Arrows
(vii) Plumb bob
(viii) pegs
2. Ranging is the operation of establishing intermediate points on a straight line between two end stations.
3. Types of Ranging
(i) Direct Ranging (ii) Indirect Ranging
4. Base line is the longest line of all the survey lines and which runs across the area.
5. Check line is used to check the accuracy of the frame work as well as plotting work.
6. Offset is a length measured from a point on a chain line to a detail.
7. Tie line is a line which joins two tie stations.
8. Types of Chains
(i) Metric chain
(ii) Engineer’s chain
(iii) Gunter chain
(iv) Revenue chain
9. Obstacles in chain surveying
(i) Chaining free but vision obstructed
(ii) Chaining obstructed but vision free
(iii) Both chaining and vision obstructed
10. Methods of calculating Land area
(i) Average ordinate rule
(ii) Simpson’s rule
(iii) Trapezoidal rule
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