18.7.1. Ground Control Points (GCPs)

Try these first

1. 1.

   What does GCP stand for?

   Hint

   Think about what each letter represents.

2. 2.

   Why are GCPs important in aerial surveys?

   Hint

   Consider how we use these points in mapping.

3. 3.

   What is the purpose of GCPs in aerial surveying?

   • To collect photographs
   • To enhance accuracy
   • To reduce costs

   Hint

   Consider their role in ensuring reliability in measurements.

4. 4.

   True or False: GCPs are only needed for large-scale projects.

   • True
   • False

   Hint

   Remember, accuracy is critical in every mapping project.

5. 5.

   You are working on a site that requires high accuracy for drone mapping. Your area has variable terrain. Discuss how you would determine the locations of GCPs and justify your reasoning.

   Hint

   Consider sightlines and areas that can be reliably surveyed.

6. 6.

   In a recent survey without GCPs, the resulting map showed significant errors, leading to construction delays. Analyze potential causes of inaccuracies and propose a corrective measure involving GCP implementation.

   Hint

   Think about how GCPs can correct misalignment.