4.27. Scaling in Arundel’s method

Try these first

1. 1.

   What does GCP stand for?

   Hint

   Think about what helps map the ground accurately.

2. 2.

   Why is a principal point important?

   Hint

   Consider the center versus edges of a photograph.

3. 3.

   What does GCP stand for?

   • Ground Control Point
   • Ground Correction Point
   • Geographic Control Point

   Hint

   Think about the 'ground' and how it relates to mapping.

4. 4.

   True or False: Radial lines are drawn from various control points back to the principal point.

   • True
   • False

   Hint

   Consider which point is central in this method.

5. 5.

   If an aerial photograph has five GCPs and one fails to meet elevation criteria, how would it affect scaling accuracy?

   Hint

   Think about how one inaccurate point impacts the entire structure.

6. 6.

   Devise a method to select MCPs for an aerial mapping project. List criteria and justify each in terms of mapping accuracy.

   Hint

   How do these points enhance mapping precision?