El índice de nieve de diferencia normalizada se usa para identificar la nieve en función de su reflectancia característicamente más alta en la porción visible del espectro en comparación con el infrarrojo medio. El NDSI se calcula con las bandas de infrarrojo medio y verde, y tiene un rango de -1.0 a 1.0. Consulta Riggs et al. (1994) para obtener más detalles. Este producto se genera a partir de los compuestos de reflectancia de superficie MODIS/006/MYD09GA.
Bandas
Bandas
Nombre
Tamaño de los píxeles
Descripción
NDSI
463.313 metros
Índice de nieve de diferencia normalizada
Condiciones de Uso
Condiciones de Uso
Los datos y productos de MODIS adquiridos a través del LP DAAC no tienen restricciones sobre su uso, venta o redistribución posteriores.
El índice de nieve de diferencia normalizada se usa para identificar la nieve en función de su reflectancia característicamente más alta en la porción visible del espectro en comparación con el infrarrojo medio. El NDSI se calcula con las bandas de infrarrojo medio y verde, y tiene un rango de -1.0 a 1.0. Consulta Riggs et al. (1994) para obtener más información.
[null,null,[],[[["\u003cp\u003eThe MODIS/MYD09GA_006_NDSI dataset provides daily Normalized Difference Snow Index (NDSI) values globally from July 4, 2002, to February 25, 2023.\u003c/p\u003e\n"],["\u003cp\u003eNDSI, derived from MODIS surface reflectance, helps identify snow cover by comparing reflectance in the visible and mid-infrared spectrum, with values ranging from -1.0 to 1.0.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for use, sale, and redistribution through Google Earth Engine, a platform for geospatial data analysis and visualization.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is provided by Google and is part of the MODIS Aqua collection, offering a 463.313-meter pixel resolution.\u003c/p\u003e\n"]]],["The MODIS/MYD09GA_006_NDSI dataset, provided by Google, spans from July 4, 2002, to February 25, 2023. It uses the Normalized Difference Snow Index (NDSI) to identify snow cover based on reflectance, with a daily cadence. The NDSI, computed from Green and Mid-IR bands, ranges from -1.0 to 1.0, having a 463.313-meter pixel size. Data from the dataset is unrestricted for use. Earth Engine provides tools to view the data.\n"],null,["# MODIS Aqua Daily NDSI\n\nDataset Availability\n: 2002-07-04T00:00:00Z--2023-02-25T00:00:00Z\n\nDataset Provider\n:\n\n\n [Google](https://earthengine.google.com/)\n\nCadence\n: 1 Day\n\nTags\n:\n aqua \n daily \n global \n modis \n myd09ga \n ndsi \n surface-reflectance \n usgs \nvegetation-indices \n\n#### Description\n\nThe Normalized Difference Snow Index is used to\nidentify snow, based on its characteristically higher reflectance in\nthe visible portion of the spectrum compared to the mid-IR. NDSI is\ncomputed using the Green and Mid-IR bands, and has a range of -1.0 to\n1.0. See\n[Riggs et al. (1994)](https://doi.org/10.1109/IGARSS.1994.399618)\nfor details. This product is generated from the MODIS/006/MYD09GA surface reflectance composites.\n\n### Bands\n\n**Bands**\n\n| Name | Pixel Size | Description |\n|--------|----------------|----------------------------------|\n| `NDSI` | 463.313 meters | Normalized Difference Snow Index |\n\n### Terms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.\n\n### Explore with Earth Engine\n\n| **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)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('MODIS/MYD09GA_006_NDSI')\n .filter(ee.Filter.date('2018-04-01', '2018-06-01'));\nvar colorized = dataset.select('NDSI');\nvar colorizedVis = {\n palette: ['000088', '0000ff', '8888ff', 'ffffff'],\n};\nMap.setCenter(-7.03, 31.05, 2);\nMap.addLayer(colorized, colorizedVis, 'Colorized');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_MYD09GA_006_NDSI) \n[MODIS Aqua Daily NDSI](/earth-engine/datasets/catalog/MODIS_MYD09GA_006_NDSI) \nThe 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 ... \nMODIS/MYD09GA_006_NDSI, aqua,daily,global,modis,ndsi,surface-reflectance,usgs,vegetation-indices \n2002-07-04T00:00:00Z/2023-02-25T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://earthengine.google.com/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_MYD09GA_006_NDSI)"]]
