5.1. Solved Examples

Try these first

1. 1.

   What is the formula to calculate the scale of a photograph?

   Hint

   Remember the role of altitude and focal length.

2. 2.

   If the elevation of a terrain is 100 m and the aircraft is at 1500 m, what is the impact on the scale?

   Hint

   Think about how elevation affects your calculations.

3. 3.

   What is the scale of a photograph taken from a height of 2000 m with a focal length of 50mm, if the terrain height is 500 m?

   • 1:3013
   • 1:4075
   • 1:5000

   Hint

   Use the scale formula correctly.

4. 4.

   True or False: The flying height has no effect on the scale.

   • True
   • False

   Hint

   Recall how flying height and scale relate.

5. 5.

   Given a line on a photograph that measures 15 cm and the corresponding ground distance is 300 m. What is the scale? If the terrain elevation is known to be 200 m with a focal length of 35 mm, calculate the flying height.

   Hint

   Convert units and check calculations based on the height differences.

6. 6.

   If an aerial photograph shows a distance of 5 cm corresponding to 100 m on the ground, find the height of the aircraft if the terrain elevation is 150 m and the focal length is 50 mm.

   Hint

   Ensure you use the correct scale and rearrange the formula accurately.