5.17.1.B. Atmospheric Correction

Try these first

1. 1.

   What is atmospheric correction?

   Hint

   Think about how images are affected by the atmosphere.

2. 2.

   What is the Dark Object Subtraction method?

   Hint

   Consider what happens to dark pixels in haze.

3. 3.

   What does atmospheric correction aim to achieve?

   • Increase DN values
   • Remove atmospheric noise
   • Add detailed features

   Hint

   Think about what happens to images due to haze.

4. 4.

   True or False: The Dark Object Subtraction method simply subtracts a constant value from all DN values.

   • True
   • False

   Hint

   Consider the basis of the correction method.

5. 5.

   Given an image with multiple dark features, how would you select the DN for Dark Object Subtraction?

   Hint

   Focus on areas that are least influenced by outside light.

6. 6.

   Discuss the implications of not performing atmospheric correction on multi-spectral land classification.

   Hint

   How might this misclassification affect environmental assessments?