Describe the procedure of indirect ranging.

Describe the procedure of indirect ranging.
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Procedure of indirect ranging.

1. If two stations i.e. A and B are not visible, then two intermediate points M1 and N1 are selected such that both stations will be intervisible from it.

2. Now, bisect the ranging rod at N1 from A and direct the rodman to move in line of AN1 to get a new position as N2

3. Similarly, bisect the rod at M1 from B and move the rod at N to N1 to N2

4. Again, by observing N2 and M2 from A and B respectively, find the new position of intermediate points N3 and N4.

5. This should be continued till final points M and N are in line with AB, thus, ranging is said to be completed.

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