1.2.2. Establishing a point by at least two independent measurements

Try these first

1. 1.

   What are independent measurements?

   Hint

   Think about why different measurements are important.

2. 2.

   Define control points in surveying.

   Hint

   Why are these points crucial for surveying accuracy?

3. 3.

   What is the primary method of establishing a new point in surveying?

   • Only linear measurements
   • Only angular measurements
   • At least two independent measurements

   Hint

   Think about what is necessary to ensure accuracy.

4. 4.

   True or False: Triangulation is not needed for mapping.

   • True
   • False

   Hint

   Consider how points are established.

5. 5.

   Given control points A(1, 2) and B(4, 5), find point C's coordinates if angle ACB is 45 degrees and AC = 5 units.

   Hint

   Draw the triangle and apply cosine for angle relationships.

6. 6.

   Discuss the potential errors when only linear measurements are used in a long survey project.

   Hint

   Reflect on what triangulation provides that linear measurement might miss.