NDDINormalized Difference Drought Index
Vegetation
(((N - R)/(N + R)) - ((G - N)/(G + N)))/(((N - R)/(N + R)) + ((G - N)/(G + N)))VegetationMultispectralN: Near-Infrared (NIR).R: Red.G: Green.No radar polarizations are used in this index.
No constants are used in this index.
Index contributed by https://github.com/davemlz on 2021-04-07.