TripleSat NDWI
Normalized Difference Water Index (McFeeters) for TripleSat
Water Satellite Provider: 21AT
Applications
open water feature detection
water body mapping
water content monitoring
turbidity estimation
wetland mapping
flood monitoring
coastal zone management
Quick Stats
Category: water
Sensor: TripleSat
Provider: 21AT
Bands Used: 2
Description
The Normalized Difference Water Index (NDWI) proposed by McFeeters (1996) is designed to delineate open water features and enhance their presence in remotely-sensed digital imagery. It uses reflected near-infrared radiation and visible green light to enhance water features while eliminating soil and terrestrial vegetation features.
Formulas
General Formula
TripleSat Specific Formula
(Green - NIR) / (Green + NIR)Spectral Band Visualization
Band Wavelengths
Green: 560
NIR: 830
Code Examples
ndwi_mcfeeters.py
References
McFeeters, S.K. (1996) - The use of the Normalized Difference Water Index (NDWI) in the delineation of open water features. International Journal of Remote Sensing, 17(7), 1425-1432