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What is NDVI in Remote Sensing Analysis?
“Normalized Difference Vegetation Index (NDVI) quantifies vegetation by measuring the difference between near-infrared (which vegetation strongly reflects) and red light (which vegetation absorbs).”
Normalized Difference Vegetation Index
NDVI is a range that spans from -1 to +1, without a clear boundary for each land cover type. Negative NDVI values are indicative of water, whereas values near +1 are likely to indicate dense green foliage.
Conversely, NDVI values near zero suggest a lack of green vegetation, which could even point to an urbanised area.
Despite its broad application in remote sensing, there are still essential considerations regarding how to calculate NDVI, what NDVI values signify, and how Earth scientists apply this index.
How do you calculate NDVI?
NDVI (Normalized Difference Vegetation Index) is a commonly used index for quantifying vegetation coverage and growth. NDVI is calculated from the reflectance values of red and near-infrared (NIR) wavelengths of electromagnetic radiation.
