AI-generated Key Takeaways
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The MODIS/MYD09GA_006_NDWI dataset provides daily Normalized Difference Water Index (NDWI) data derived from MODIS Aqua surface reflectance composites.
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NDWI is sensitive to changes in liquid water content of vegetation canopies and ranges from -1.0 to 1.0.
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This dataset is freely available for use with Google Earth Engine and has global coverage from 2002 to 2023.
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The dataset has a spatial resolution of 463.313 meters and can be used to monitor vegetation water content changes.
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MODIS data acquired through the LP DAAC has no restrictions on subsequent use, sale, or redistribution.
- Dataset Availability
- 2002-07-04T00:00:00Z–2023-02-25T00:00:00Z
- Dataset Provider
- Cadence
- 1 Day
- Tags
Description
The Normalized Difference Water Index (NDWI) is sensitive to changes in liquid water content of vegetation canopies. It is derived from the Near-IR band and a second IR band, ≈1.24μm when available and the nearest available IR band otherwise. It ranges in value from -1.0 to 1.0. See Gao (1996) for details. This product is generated from the MODIS/006/MYD09GA surface reflectance composites.
Bands
Bands
| Name | Pixel Size | Description |
|---|---|---|
NDWI |
463.313 meters | Normalized Difference Water Index |
Terms of Use
Terms of Use
MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('MODIS/MYD09GA_006_NDWI') .filter(ee.Filter.date('2018-04-01', '2018-06-01')); var colorized = dataset.select('NDWI'); var colorizedVis = { min: 0.0, max: 1.0, palette: ['0000ff', '00ffff', 'ffff00', 'ff0000', 'ffffff'], }; Map.setCenter(-7.03125, 31.0529339857, 2); Map.addLayer(colorized, colorizedVis, 'Colorized');