![MODIS/MOD09GA_006_NDSI](https://developers.google.com/earth-engine/datasets/images/MODIS/MODIS_MOD09GA_006_NDSI_sample.png)

Dataset Availability
:   2000-02-24T00:00:00Z--2023-02-17T00:00:00Z

Dataset Producer
:


    [Google](https://earthengine.google.com/)

Cadence
:   1 Day

Tags
:
    daily global mod09ga modis ndsi surface-reflectance terra usgs vegetation-indices

#### 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)](https://doi.org/10.1109/IGARSS.1994.399618)
for details. This product is generated from the MODIS/006/MOD09GA surface reflectance composites.

### Bands

**Bands**

Pixel size: 463.313 meters (all 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

> [!NOTE]
> **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)

### Code Editor (JavaScript)

```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');
```
[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_MOD09GA_006_NDSI) [MODIS Terra Daily NDSI](https://developers.google.com/earth-engine/datasets/catalog/MODIS_MOD09GA_006_NDSI) 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 ... MODIS/MOD09GA_006_NDSI, daily,global,modis,ndsi,surface-reflectance,terra,usgs,vegetation-indices 2000-02-24T00:00:00Z/2023-02-17T00:00:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets

- [](https://doi.org/https://earthengine.google.com/)
- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_MOD09GA_006_NDSI)