traversing resection intersection radiation
Answer Discuss in Comment
gives more accurate problem takes less time requires more labor none of the above
resection and orientation traversing resection orientation
vertical control centring horizontal control ranging
a quick method adopted for large surveys only suitable for hilly terrains most accurate method
∑B.S.- ∑F.S = Last R.L.- First R.L. only ∑B.S - ∑FF.S = ∑Rise-∑Fall = Last R.L. — First R.L. ∑Rise -∑Fall = Last R.L. - First R.L. only ∑B.S.- ∑F.s = ∑Rise -∑Fall only
- and - + and + - and + + and -
the top of summit the bottom of a valley one side of the slope anywhere
In levelling, a station is the point where the levelling staff is held and not where level is set up. The inner surface of a bubble tube is an arc of a circle. Sensitiveness of a level tube can be increased by the increase in length of bubble. all of the above statements are incorrect.
Error due to refraction may not be completely eliminated by reciprocal levelling. Tilting levels are commonly used for precision work. The last reading of levelling is always a foresight. All of the above statements are incorrect.
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