GGreen.
RWIRescaled Water Index
WaterMultispectralCitation Rank #310
Skip to content No radar polarizations are used in this index. No contextual reductions are used in this index.
Summary
The Rescaled Water Index (RWI) is a water spectral index intended for multispectral sensing. It was introduced in 2025; its source is cited as Eduardo Felix Justiniano, Fernando Shinji Kawakubo, Edimilson Rodrigues dos Santos Junior, Breno Malheiros de Melo, Gustavo Paixão Menezes, Marcel Fantin, Julio Cesar Pedrassoli, Marcos Roberto Martines, & Rúbia Gomes Morato (2025). A New Spectral Index for Mapping Water Surfaces in Urban Contexts. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 18. https://doi.org/10.1109/jstars.2025.3562089 .
Based on the latest citation data, this index is in the 2.52th percentile overall, ranking 310 out of 317 indices with citation data. Among the 19 indices published within two years of 2025, it ranks 13 (36.84th percentile). Within the water application domain, it is in the 3.12th percentile and ranks 32 out of 32 indices with citation data. Among the 4 similarly aged water indices, it ranks 4 (25th percentile).
Formula
((G ** (1.0 / 2.71828)) * (1.0 / n) - S1) / ((G ** (1.0 / 2.71828)) * (1.0 / n) + S1)Bands
S1Short-wave Infrared (SWIR) 1.
Polarizations
Constants
nAdjustment factor. This constant is calculated as `n = median(G ** (1.0 / 2.71828)) / median(G)`, reducing the spatial dimension (see https://doi.org/10.1109/JSTARS.2025.3562089).
Default value5