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Methods of sloping ground - Direct Method
Unit 1- Surveying
To get the horizontal distance in sloping ground, there are two methods
- Direct method
- Indirect method
Direct method or stepping method
In this method the distance measured in small horizontal stretches or steps. The follower holds the zero end of the tape at A, the leader select any suitable length l1 of the tape and moves forward. The follower directs the leader for ranging. The leader pulls the tape tight, make it horizontal and the point 1(one) is transferred to the ground by plumb bob or by using drop arrow. The procedure is repeated. The total length “D” of the line is then equal to l1+l2+l3+……………………It is more convenient to measure down-hill than to measure uphill. The lengths l1, l2 etc., to be selected depend on the steepness of the slope. Steeper the slope, lesser the length and vice versa.
Last modified: Thursday, 21 April 2011, 10:38 AM