정규화된 차이 눈 지수는 스펙트럼의 가시광선 부분이 중적외선에 비해 특징적으로 더 높은 반사율을 기반으로 눈을 식별하는 데 사용됩니다. NDSI는 녹색 및 중적외선 대역을 사용하여 계산되며 범위는 -1.0~1.0입니다. 자세한 내용은 Riggs et al. (1994)를 참고하세요. 이 제품은 MODIS/006/MOD09GA 표면 반사율 합성에서 생성됩니다.
대역
대역
이름
픽셀 크기
설명
NDSI
463.313미터
정규화된 차이 눈 지수
이용약관
이용약관
LP DAAC를 통해 획득한 MODIS 데이터 및 제품에는 후속 사용, 판매 또는 재배포에 대한 제한이 없습니다.
정규화된 차이 눈 지수는 중적외선에 비해 스펙트럼의 가시 부분에서 특징적으로 더 높은 반사율을 기반으로 눈을 식별하는 데 사용됩니다. NDSI는 녹색 및 중적외선 대역을 사용하여 계산되며 범위는 -1.0~1.0입니다. 자세한 내용은 Riggs et al. (1994)을 참고하세요.
[null,null,[],[[["\u003cp\u003eThe MODIS/MOD09GA_006_NDSI dataset provides daily, global Normalized Difference Snow Index (NDSI) values derived from MODIS Terra surface reflectance composites.\u003c/p\u003e\n"],["\u003cp\u003eNDSI, 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.\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 dataset covers the period from February 24, 2000, to February 17, 2023, and is provided by Google.\u003c/p\u003e\n"]]],[],null,["# MODIS Terra Daily NDSI\n\nDataset Availability\n: 2000-02-24T00:00:00Z--2023-02-17T00:00:00Z\n\nDataset Provider\n:\n\n\n [Google](https://earthengine.google.com/)\n\nCadence\n: 1 Day\n\nTags\n:\n daily \n global \n mod09ga \n modis \n ndsi \n surface-reflectance \n terra \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/MOD09GA 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/MOD09GA_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(-7.03125, 31.0529339857, 2);\nMap.addLayer(colorized, colorizedVis, 'Colorized');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_MOD09GA_006_NDSI) \n[MODIS Terra Daily NDSI](/earth-engine/datasets/catalog/MODIS_MOD09GA_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/MOD09GA_006_NDSI, daily,global,modis,ndsi,surface-reflectance,terra,usgs,vegetation-indices \n2000-02-24T00:00:00Z/2023-02-17T00:00:00Z \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_MOD09GA_006_NDSI)"]]
