1.18.6. Prolonging a straight line

Try these first

1. 1.

   What is the first step when setting up a theodolite?

   Hint

   Think about what ensures precise measurements.

2. 2.

   Why is bisection of point B necessary?

   Hint

   Consider the impact of misalignment.

3. 3.

   What is the first action when prolonging a line with a theodolite?

   • Set up at point B
   • Bisect point A
   • Level the theodolite

   Hint

   Consider what makes the instrument stable.

4. 4.

   True or False: Bisection is not necessary in prolonging a line.

   • True
   • False

   Hint

   Think about the importance of accuracy.

5. 5.

   You are attempting to prolong a line across a hilly terrain where visibility is limited. Devise a strategy for ensuring accuracy in line extension.

   Hint

   Think about how you can adjust for obstructions in sight.

6. 6.

   In a city environment filled with buildings, how would you adapt the prolongation technique to ensure precise line alignment?

   Hint

   Consider how visibility is affected by urban settings.