4.10. Relief Displacement of a Vertical Photograph

Try these first

1. 1.

   What is relief displacement?

   Hint

   Look for how height influences position.

2. 2.

   How do taller objects appear in aerial photographs?

   Hint

   Consider the direction of displacement.

3. 3.

   What is the principle effect of relief displacement?

   • Reduction in photo clarity
   • Distortion of object positions
   • Improved measurement accuracy

   Hint

   Think about what happens when heights differ.

4. 4.

   True or False: Relief displacement is greatest at the principal point.

   • True
   • False

   Hint

   Remember where displacement starts.

5. 5.

   A building is 40 meters tall, and the photographer is at a height of 800 meters. Calculate the relief displacement for this building.

   Hint

   Remember substitution of values is key.

6. 6.

   Discuss how measuring at the edges of a photograph may introduce greater errors. Provide examples based on scenario calculations.

   Hint

   Use examples of tall structures and valleys to illustrate.