4. Image Analysis
Spectral Indices — Quiz
Test your understanding of spectral indices with 5 practice questions.
Practice Questions
Question 1
Which spectral index is most effective for distinguishing between bare soil and vegetated areas?
Question 2
When analyzing an image, if an area shows high reflectance in the Short-Wave Infrared (SWIR) band and low reflectance in the Near-Infrared (NIR) band, which land cover type is it most likely to be?
Question 3
How does the presence of clouds typically affect the calculation and interpretation of spectral indices in remote sensing?
Question 4
What is the primary reason for using the 'Normalized Difference' approach in spectral indices like NDVI, NDWI, and NDBI?
Question 5
Consider the formula for a generic Normalized Difference Index: $ \frac{Band_1 - Band_2}{Band_1 + Band_2} $ If Band 1 represents the Near-Infrared (NIR) band and Band 2 represents the Short-Wave Infrared (SWIR) band, what would a high positive value of this index typically indicate?