3.3.10.7. Vertical Circle Error

Try these first

1. 1.

   What is a vertical circle error?

   Hint

   Think about what happens when an angle measurement is incorrect.

2. 2.

   Why is it important to check the index error?

   Hint

   Consider what happens when readings are off?

3. 3.

   What is the acceptable sum of direct and indirect zenith angles?

   • 180 degrees
   • 360 degrees
   • 90 degrees

   Hint

   Remember the total of angles around a point.

4. 4.

   True or False: Compensating for vertical circle errors is not necessary.

   • True
   • False

   Hint

   What happens if errors are left uncorrected?

5. 5.

   A survey team reports that the sum of the direct and indirect zenith angles for a particular measurement is 362°. What steps should the team take to address this discrepancy?

   Hint

   Think about what needs to be checked first.

6. 6.

   After measuring several zenith angles, a surveyor notes repeated discrepancies in readings. Explain a systematic procedure to address these issues.

   Hint

   Consider the importance of double-checking readings and adjustments.