4.8.4. Perspective (Central) projection

Try these first

1. 1.

   What is the perspective center in aerial photography?

   Hint

   Think of the horizon where all lines converge.

2. 2.

   How does geometric distortion occur?

   Hint

   Consider how tall objects might look in photos.

3. 3.

   What is central projection?

   • A photography technique using multiple angles
   • An abstraction of features in a photograph
   • A projection where rays converge at a single point

   Hint

   Think about how images form in photography.

4. 4.

   True or False: In perspective projection, scale is uniform across the image.

   • True
   • False

   Hint

   Reflect on how distances can change based on the viewer's position.

5. 5.

   Explain how elevation differences affect perspective projection in aerial photography. Provide examples of how this may distort the interpretation of the image.

   Hint

   Think about how you would view varying heights from a distance.

6. 6.

   You have an aerial photograph of a region with contrasting elevation levels. Propose a method for correcting the resulting distortions when creating a map from this photograph.

   Hint

   Consider how technology can help in mapping uneven terrain.