4.9. Scale of a Vertical Photograph

Try these first

1. 1.

   What is the scale of a vertical photograph if the distance between two objects on the ground is 200m and the distance on the photograph is 2m?

   Hint

   Use the formula S = ab / AB.

2. 2.

   If a camera has a focal length of 50mm and the height is 200m, what is the scale?

   Hint

   Apply the formula S = f / H.

3. 3.

   What is the formula for calculating the scale of a vertical photograph?

   • S = f/H
   • S = AB/ab
   • S = f/(H - h)

   Hint

   Consider how focal length and height interplay in scale determination.

4. 4.

   True or False: The scale of a photograph remains the same irrespective of the elevation of objects.

   • True
   • False

   Hint

   Recall how scale changes with varied elevations.

5. 5.

   You have a vertical photograph taken from an altitude of 1200m with a focal length of 75mm. Calculate the scale. If an object on the ground was measured to be 15m in reality, what would be its size on the photograph?

   Hint

   Apply the formula for scale and convert distances as needed.

6. 6.

   Analyze a scenario where the flying height changes from 800m to 1200m with the same focal length of 100mm. Explain how this impacts the scale and why.

   Hint

   Consider the relationships presented about scale and flight height.