Der normierte differenzierte Wasserindex (Normalized Difference Water Index, NDWI) reagiert empfindlich auf Änderungen des Flüssigwassergehalts von Pflanzenbeständen. Er wird aus dem Nah-IR-Band und einem zweiten IR-Band abgeleitet, das bei Verfügbarkeit ≈1,24 μm beträgt, ansonsten das nächstgelegene verfügbare IR-Band. Die Werte reichen von -1,0 bis 1,0. Weitere Informationen finden Sie unter Gao (1996). Dieses Produkt wird aus den MODIS/006/MCD43A4-Oberflächenreflexionsverbundbildern generiert.
Bänder
Bänder
Name
Pixelgröße
Beschreibung
NDWI
463.313 Meter
Normalisierter Differenz-Wasserindex
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 normierte differenzierte Wasserindex (Normalized Difference Water Index, NDWI) reagiert empfindlich auf Änderungen des Flüssigwassergehalts von Vegetationskronen. Er wird aus dem NIR-Band und einem zweiten IR-Band abgeleitet, das, sofern verfügbar, bei etwa 1,24 μm liegt.Andernfalls wird das nächstgelegene verfügbare IR-Band verwendet. Der Wert liegt zwischen -1,0 und 1,0. Siehe Gao (1996) …
[null,null,[],[[["\u003cp\u003eThe MODIS/MCD43A4_006_NDWI dataset provides daily global Normalized Difference Water Index (NDWI) values, derived from MODIS surface reflectance composites.\u003c/p\u003e\n"],["\u003cp\u003eNDWI, ranging from -1.0 to 1.0, indicates changes in liquid water content within vegetation canopies using near-infrared and infrared bands.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is freely available for use, sale, and redistribution through the Google Earth Engine platform.\u003c/p\u003e\n"],["\u003cp\u003eThe data covers the period from February 24, 2000, to February 10, 2023, and is provided by Google.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze the dataset using the Earth Engine Code Editor for visualization and research purposes.\u003c/p\u003e\n"]]],["The dataset, available from 2000-02-24 to 2023-02-10 via Google Earth Engine, contains the Normalized Difference Water Index (NDWI) derived from MODIS/MCD43A4 surface reflectance composites. It measures changes in vegetation liquid water content, calculated using Near-IR and another IR band, and ranges from -1.0 to 1.0. Data is provided daily, at 463.313-meter resolution. The dataset can be accessed using the `ee.ImageCollection(\"MODIS/MCD43A4_006_NDWI\")` snippet and is free for research, education, and nonprofit use.\n"],null,["# MODIS Combined 16-Day NDWI\n\nDataset Availability\n: 2000-02-24T00:00:00Z--2023-02-10T00:00:00Z\n\nDataset Provider\n:\n\n\n [Google](https://earthengine.google.com/)\n\nCadence\n: 1 Day\n\nTags\n:\n albedo \n brdf \n daily \n global \n mcd43a4 \n modis \n nasa \n ndwi \n reflectance \n usgs \nvegetation-indices \n\n#### Description\n\nThe Normalized Difference Water Index (NDWI) is sensitive\nto changes in liquid water content of vegetation canopies. It is\nderived from the Near-IR band and a second IR band, ≈1.24μm when\navailable and the nearest available IR band otherwise. It ranges in\nvalue from -1.0 to 1.0. See\n[Gao (1996)](https://www.sciencedirect.com/science/article/pii/S0034425796000673)\nfor details. This product is generated from the MODIS/006/MCD43A4 surface reflectance composites.\n\n### Bands\n\n**Bands**\n\n| Name | Pixel Size | Description |\n|--------|----------------|-----------------------------------|\n| `NDWI` | 463.313 meters | Normalized Difference Water 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/MCD43A4_006_NDWI')\n .filter(ee.Filter.date('2018-04-01', '2018-06-01'));\nvar colorized = dataset.select('NDWI');\nvar colorizedVis = {\n min: 0.0,\n max: 1.0,\n palette: ['0000ff', '00ffff', 'ffff00', 'ff0000', 'ffffff'],\n};\nMap.setCenter(-7.03125, 31.0529339857, 2);\nMap.addLayer(colorized, colorizedVis, 'Colorized');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_MCD43A4_006_NDWI) \n[MODIS Combined 16-Day NDWI](/earth-engine/datasets/catalog/MODIS_MCD43A4_006_NDWI) \nThe 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) ... \nMODIS/MCD43A4_006_NDWI, albedo,brdf,daily,global,mcd43a4,modis,nasa,ndwi,reflectance,usgs,vegetation-indices \n2000-02-24T00:00:00Z/2023-02-10T00:00:00Z \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_MCD43A4_006_NDWI)"]]
