AI-generated Key Takeaways
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The MODIS/MOD09GA_006_NDSI dataset provides daily, global Normalized Difference Snow Index (NDSI) values derived from MODIS Terra surface reflectance composites.
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NDSI, ranging from -1.0 to 1.0, helps identify snow cover based on its higher reflectance in the visible spectrum compared to the mid-infrared.
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This dataset is freely available for use, sale, and redistribution through the Google Earth Engine platform.
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The dataset covers the period from February 24, 2000, to February 17, 2023, and is provided by Google.
- Dataset Availability
- 2000-02-24T00:00:00Z–2023-02-17T00:00:00Z
- Dataset Provider
- Cadence
- 1 Day
- Tags
Description
The Normalized Difference Snow Index is used to identify snow, based on its characteristically higher reflectance in the visible portion of the spectrum compared to the mid-IR. NDSI is computed using the Green and Mid-IR bands, and has a range of -1.0 to 1.0. See Riggs et al. (1994) for details. This product is generated from the MODIS/006/MOD09GA surface reflectance composites.
Bands
Bands
| Name | Pixel Size | Description |
|---|---|---|
NDSI |
463.313 meters | Normalized Difference Snow 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/MOD09GA_006_NDSI') .filter(ee.Filter.date('2018-04-01', '2018-06-01')); var colorized = dataset.select('NDSI'); var colorizedVis = { palette: ['000088', '0000ff', '8888ff', 'ffffff'], }; Map.setCenter(-7.03125, 31.0529339857, 2); Map.addLayer(colorized, colorizedVis, 'Colorized');