1.15.6.a. Simple levelling

Try these first

1. 1.

   What does a benchmark represent in levelling?

   Hint

   Think about why we need a starting point for our measurements.

2. 2.

   What are the two readings taken in simple levelling?

   Hint

   Remember, we measure the benchmark first.

3. 3.

   What is the formula used to calculate the reduced level (RL) in simple levelling?

   Hint

   Think of it in terms of what components are added or subtracted.

4. 4.

   True or False: Simple levelling can only be performed using digital levels.

   • True
   • False

   Hint

   Recall the types of levels available for surveying.

5. 5.

   You have a benchmark at 120.000 m. After taking a back sight of 3.250 m and a fore sight of 6.500 m, determine the RL of the unknown point and discuss potential errors.

   Hint

   Ensure you apply the formula correctly while considering how errors can affect your result.

6. 6.

   In a simple levelling task, a surveyor records a BS of 1.750 m and an FS of 3.000 m with a benchmark of 80.500 m. Identify and fix any calculation errors if the calculated RL appears inconsistent.

   Hint

   Reassess each measurement and see how they fit into the equation.