5.17.1.A. Geometric Corrections

Try these first

1. 1.

   What is the purpose of georeferencing in remote sensing?

   Hint

   Think about why we need accurate maps.

2. 2.

   Name one resampling method used after georeferencing.

   Hint

   Recall the methods we discussed.

3. 3.

   What does georeferencing do?

   • Transforms image formats
   • Aligns images to geographic coordinates
   • Increases image resolution

   Hint

   Think about how mapping works.

4. 4.

   True or False: Resampling is not necessary after georeferencing.

   • True
   • False

   Hint

   Recall the steps involved in geometric corrections.

5. 5.

   You are georeferencing an image where the GCPs are located unevenly across the image. How could this affect the accuracy of your georeferencing process? Suggest a method to improve the accuracy.

   Hint

   Think about why having points in various locations matters.

6. 6.

   Assuming you are working with a highly distorted image, how would you decide between using nearest neighbour and cubic convolution for resampling?

   Hint

   Reflect on the balance between quality and accuracy.