1.14. Measurement of Bearings

Try these first

1. 1.

   Define what a bearing is in surveying.

   Hint

   Think about how we describe directions in everyday life.

2. 2.

   What are the two main types of meridians?

   Hint

   Consider directions based on natural phenomena versus magnetic indicators.

3. 3.

   What is a bearing in surveying?

   Hint

   Think about how bearings help in navigation.

4. 4.

   True meridian is established through astronomical observations.

   • True
   • False

   Hint

   Consider what methods determine true positions on Earth.

5. 5.

   A surveyor measures the magnetic bearing of line AB as 200°. The magnetic declination at the location is 15° east. What is the true bearing of line AB?

   Hint

   Follow the adjustment direction for declination carefully.

6. 6.

   Two surveying points A and B are set up. A fore bearing from A to B is measured as 340° while the back bearing from B to A is recorded as 160°. Are these readings accurate?

   Hint

   Always check the difference in bearings when traversing.