NNear-Infrared (NIR).
NDDINormalized Difference Drought Index
VegetationMultispectralCitation Rank #108
Skip to content No radar polarizations are used in this index. No constants are used in this index. No contextual reductions are used in this index.
Summary
The Normalized Difference Drought Index (NDDI) is a vegetation spectral index intended for multispectral sensing. It was introduced in 2007; its source is cited as Yingxin Gu, Jesslyn F. Brown, James P. Verdin, & Brian Wardlow (2007). A fiveāyear analysis of MODIS NDVI and NDWI for grassland drought assessment over the central Great Plains of the United States. Geophysical Research Letters, 34(6). https://doi.org/10.1029/2006gl029127 .
Based on the latest citation data, this index is in the 66.25th percentile overall, ranking 108 out of 317 indices with citation data. Among the 41 indices published within two years of 2007, it ranks 10 (78.05th percentile). Within the vegetation application domain, it is in the 54.46th percentile and ranks 98 out of 213 indices with citation data. Among the 23 similarly aged vegetation indices, it ranks 7 (73.91th percentile).
Formula
(((N - R)/(N + R)) - ((G - N)/(G + N)))/(((N - R)/(N + R)) + ((G - N)/(G + N)))Bands
RRed.
GGreen.