Der Normalized Difference Snow Index (NDSI) wird verwendet, um Schnee anhand seiner charakteristisch höheren Reflexion im sichtbaren Teil des Spektrums im Vergleich zum mittleren Infrarot zu identifizieren. Der NDSI wird anhand der grünen und mittleren Infrarotbänder berechnet und hat einen Bereich von -1,0 bis 1,0. Weitere Informationen finden Sie unter Riggs et al. (1994). Dieses Produkt wird aus den MODIS/006/MYD09GA-Oberflächenreflexionsverbundbildern generiert.
Bänder
Bänder
Name
Pixelgröße
Beschreibung
NDSI
463.313 Meter
Normalisierter Differenz-Schneeindex
Nutzungsbedingungen
Nutzungsbedingungen
Für MODIS-Daten und ‑Produkte, die über das LP DAAC erworben wurden, gelten keine Einschränkungen hinsichtlich der weiteren Verwendung, des Verkaufs oder der Weitergabe.
Der Normalized Difference Snow Index (NDSI) wird verwendet, um Schnee anhand seiner charakteristisch höheren Reflexion im sichtbaren Teil des Spektrums im Vergleich zum mittleren Infrarot zu identifizieren. Der NDSI wird anhand der Grün- und Mid-IR-Bänder berechnet und hat einen Bereich von -1,0 bis 1,0. Weitere Informationen finden Sie in Riggs et al. (1994).
[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)"]]
