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Question
Which of the following methods of contouring is most suitable for hilly terrain?
igkM+h HkwHkkx ds :ijs[k.k (leksPp js[k.k) ds fy, fuEufyf[kr esa ls dkSu&lh पद्यति(fof/k) lcls mi;qDr gS\
A.
Direct method
B.
Square method
C.
Cross-section method
D.
Tacheometric method    
Answer ( Option D)

Tacheometric method    

Solution

Methods of contouring :-
(i) Direct method : In this method, points of equal elevation on the terrain are physically located and then plotted on map. This is a tedious process and requires more time and resources than required in the indirect method.
(ii) Indirect method : It is subdivided into following three methods:
(a) Cross-section method: Most suitable for road works, rail works, canals etc.
(b) Square or Grid method: Used for contouring of plains or gently sloping ground. Square grids are marked on the land, levels are then taken at all the corners of the square and intersection of diagonals.
(c) Tacheometric method: Used for contouring of very steep hills with the help of a tacheometer.

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