8.4. Photogrammetric Terminology

Try these first

1. 1.

   What is the Principal Point in photogrammetry?

   Hint

   Think about where the camera's focus is directed.

2. 2.

   Define the Nadir Point.

   Hint

   Consider directly below where the camera is aimed.

3. 3.

   What is the definition of the Principal Point?

   • A point above the camera
   • The intersection of the optical axis with the image plane
   • The point behind the camera

   Hint

   Think about where the camera is focusing.

4. 4.

   True or False: The Nadir Point is the point directly below the camera.

   • True
   • False

   Hint

   Remember, it's directly beneath where the camera is aimed.

5. 5.

   Given a flight path with 70% forward overlap, calculate how many images are needed to cover a 1000-meter stretch if each image covers 500 meters.

   Hint

   Consider how much area each subsequent image overlaps!

6. 6.

   Explain how an incorrect understanding of the isocenter could lead to distortions in a 3D model.

   Hint

   Think about how measurements are referenced in spatial modeling.