4.39. Unsolved numerical questions

Try these first

1. 1.

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

   Hint

   Remember to convert everything to the same units.

2. 2.

   If a flying height is 1500 m and focal length is 25 cm, what is the scale?

   Hint

   Determine the average elevation first.

3. 3.

   What does a scale of 1:5000 indicate?

   • 1 inch on photo equals 5000 inches in reality
   • 1 cm on photo equals 5000 cm in reality
   • 1 meter on photo equals 5000 meters in reality

   Hint

   Consider how the ratios translate in real fractions.

4. 4.

   True or False: Relief displacement is the same for all terrain heights.

   • True
   • False

   Hint

   Think about how height affects visual representation in photos.

5. 5.

   A camera at a 2000 m altitude captures a 60 m high building. If the image of the building displays a relief displacement of 30 mm, determine the flying height using the displacement formula.

   Hint

   Start solving through the formula.

6. 6.

   In a photography survey, the flying height can be shifted. If at 1800 m we have three terrain heights measured as 200 m, 500 m, and 350 m, determine the maximum visible scale using the plane's performance ratio.

   Hint

   Remember how focusing on the tallest structure can affect the scale calculations.