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2 pts What is the formula for NDVI?

Reveal answer

Correct: (NIR − Red) / (NIR + Red)

Model answer

  • NDVI = (NIR − Red) / (NIR + Red). Range −1 to +1.
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NIR comes FIRST (it's bigger for vegetation). Difference on top, sum on bottom. NIR/Red is the Simple Ratio — a different index.