Question

explain the two cases of obstacle to changing but not ranging​

Answer 1

Answer:

There may be two cases of this obstacle i.e obstacle to chaining but not ranging, when it is possible to chain round the obstacle, i.e a pond, hedge etc and when it is not possible to chain round the obstacle e.g. a river. 5. Both ends of the line may not be visible from intermediate points on the line.

Explanation:

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Answer 2

Explanation: There may be two cases of this obstacle i.e obstacle to chaining but not ranging, when it is possible to chain round the obstacle, i.e a pond, hedge etc and when it is not possible to chain round the obstacle e.g. a river. 5. Both ends of the line may not be visible from intermediate points on the line.