8.7. Ground Control in Photogrammetry

Try these first

1. 1.

   What are Ground Control Points (GCPs)?

   Hint

   Think about their role in mapping accuracy.

2. 2.

   Why do we need Vertical Control?

   Hint

   Consider what vertical measurements are used in.

3. 3.

   What is a Ground Control Point?

   • A point with unknown coordinates
   • A reference point with known coordinates
   • A random point in the photo

   Hint

   Remember their role in accuracy.

4. 4.

   Is a Total Station used to establish GCPs?

   • True
   • False

   Hint

   Think about the equipment used for surveying.

5. 5.

   Design an aerial survey project for a city using GCPs, outlining the methods for GCP establishment and discussing their importance.

   Hint

   Consider urban layout and how GCPs will facilitate accurate measurements.

6. 6.

   Analyze the potential consequences if an aerial mapping project omits GCPs.

   Hint

   Think about the economic and safety aspects involved.