Land surveying — levelling, total station

What you'll learn

1. 1

   Imagine building a house on a slope — you need to know how much higher the back is than the front.

2. 2

   Set up the level and read the staff — the reading is 1.234 m at point A.

3. 3

   Let's find the height difference between two points.

4. 4

   Now you try — staff at point A reads 0.987 m, at point B reads 1.654 m. How much higher is B?

5. 5

   A total station measures both distance and angle. What does the 'total' mean?

6. 6

   Set up the total station to measure a 45° angle from the reference point.

7. 7

   If the backsight reading is 1.500 m and the foresight reading is 2.100 m, which point is higher?