4.8.35. Principal plane

Try these first

1. 1.

   Define the Principal Plane.

   Hint

   Think about how this plane relates to the camera's position.

2. 2.

   What is the role of the perspective center in aerial photography?

   Hint

   Consider where the camera takes measurements from.

3. 3.

   What is the principal plane in photogrammetry?

   • A horizontal plane
   • A vertical plane
   • A tilted plane

   Hint

   Remember the definition we discussed in class.

4. 4.

   The perspective center helps in processing aerial photographs: True or False?

   • True
   • False

   Hint

   Think about its significance in measurements.

5. 5.

   Given the tilt angle of a photo, derive how this might distort the perceived heights of buildings in the image.

   Hint

   Consider trigonometric functions to solve for heights.

6. 6.

   If the focal length is increased, how will this mathematically affect the distance measurements taken from the principal plane?

   Hint

   Refer back to the relationship between focal length and scale.