Procedure to measure the distance on erratic path
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Erratic or zig zag lines
The distances along all such features can be measured by placing a thread at the starting point and carrying it along the line up to the end point. The thread is then stretched and measured to determine the distance. It can also be measured by using a simple instrument called Rotameter
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When measuring distances in a field, reference is always made to horizontal distances. In flat areas, these (horizontal) distances can be measured directly. In steep sloping areas, however, it is Incorrect to assume that the distance measured over the ground surface is the horizontal distance.
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