Normalized Difference Water Index (NDWI):
McFeeters (1996): (GREE-NIR)/(GREE+NIR)
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Index interpretation:
Values of water bodies are larger than 0.5.
Vegetation has much smaller values, which distinguishing vegetation from water body.
Built-up areas have positive values between 0-0.2.
It is a important Gis technique for analysis of different planning and development processes.
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