1. What is the difference between an intermediate sight and a foresight? 2. Why

Question

1. What is the difference between an intermediate sight and a foresight? 2. Why is it important to attempt to level the tripod before attaching the instrument to the tripod? 3. Where should the three leveling screws be located before leveling the instrument? Explain. 4. Why is it suggested to keep the backsight distance and foresight distance roughly equal? 5. During the lab, the elevations for hubs A, B and C were calculated 3 times; once per lab crew member. Did each setup and observations yield the same elevation for stakes A, B and C? Explain your answer and give reasons for differences. 6. How close did the measurements from the 100' tape compare to stadia line technique for distances. Did the stadia line method come close enough to provide a rough estimate for horizontal distances?

Explanation / Answer

1) Foresight is taken on the last station before changing the instrument station while intermediate sight is taken on all station in between the back sight and foresight.

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