Explain Direct method of chaining on sloping ground with neat skeetch.
While chaining on sloping ground, the horizontal distances can be computed by direct method i.e. By stepping.
By stepping: It consist in measuring the distance in small horizontal lengths (e.g.L1). Let the horizontal distance between A and B be measured by a chain or tape. A portion of chain say 2m, 4m, 5m, and 10 m is stretched horizontally with one end resting on the ground and other held in line at a convenient height say 1 to 1.5 m. The point vertically below this end is then accurately marked with the help of plumb bob. The next step will then start from this point and method is continued in the correct line with point B. Then length of line AB=L1 +L2 +L3+L4