1.18.10. Errors in theodolite observations

Try these first

1. 1.

   What is a common error you might encounter when setting up a theodolite?

   Hint

   Think about the physical setup of the instrument.

2. 2.

   What does averaging readings accomplish in surveying?

   Hint

   Consider how different readings can differ due to various factors.

3. 3.

   What is one way to minimize errors in theodolite observations?

   • Switching the face
   • Using a longer tape
   • Reducing the staff height

   Hint

   Consider how changing direction can correct some observational issues.

4. 4.

   True or False: Always assume any single reading from a theodolite is correct.

   • True
   • False

   Hint

   Think about how you check for errors.

5. 5.

   The readings taken from two vernier scales were 40.0° and 40.2°. What adjustment would you make, and what is the corrected value?

   Hint

   Think about how averaging helps eliminate discrepancies.

6. 6.

   During a session, you realize that an error was present in collimation due to the misalignment of the telescope. Outline the steps to correct this error.

   Hint

   Consider the initial steps you take when setting up your equipment.