1.15.6.b. Differential levelling

Try these first

1. 1.

   Define differential levelling.

   Hint

   Think about why we would need multiple setups.

2. 2.

   What does Back Sight (BS) represent?

   Hint

   Recall what we read first when setting up.

3. 3.

   What is the main purpose of differential levelling?

   • To measure distances
   • To find elevation differences
   • To create maps

   Hint

   Think about what we discussed in class about its importance.

4. 4.

   True or False: A fore sight is taken at a point of known elevation.

   • True
   • False

   Hint

   Recall the definitions we reviewed.

5. 5.

   A surveyor sets up a differential levelling task with a benchmark of 150.000 m. He records a Back Sight of 1.500 m and a Fore Sight of 0.800 m. Determine the RL of the new point.

   Hint

   Apply the RL calculation formula from our session.

6. 6.

   Discuss potential environmental factors that could lead to inaccuracies in differential levelling and provide solutions.

   Hint

   Think about the effects of nature on visibility and precision.