GIMMS NDVI, küresel 1/12 derece enlem/boylam ızgarası için NOAA'nın AVHRR sensörlerinden birkaçıyla oluşturulur. GIMMS NDVI veri kümesinin en son sürümünün adı NDVI3g'dir (AVHRR sensörlerinden elde edilen üçüncü nesil GIMMS NDVI).
Bantlar
Piksel Boyutu 9.277 metre
Bantlar
Ad
Min.
Maks.
Piksel Boyutu
Açıklama
ndvi
-1
1
metre
NDVI
qa
metre
Kalite güvencesi işareti
qa için bit maskesi
Bit 0-2: QA işareti değerleri
1: Fiyat/kalite oranı iyi
2: Fiyat/kalite oranı iyi
3: Eğri interpolasyonundan alınan NDVI
4: Eğri enterpolasyonundan alınan NDVI, muhtemelen kar
5: Ortalama mevsimsel profilden alınan NDVI
6: Mevsimlik ortalama profilden alınan NDVI, muhtemelen kar
GIMMS NDVI, küresel 1/12 derece enlem/boylam ızgarası için NOAA'nın AVHRR sensörlerinden oluşturulur. GIMMS NDVI veri kümesinin en son sürümünün adı NDVI3g'dir (AVHRR sensörlerinden elde edilen üçüncü nesil GIMMS NDVI).
[null,null,[],[[["\u003cp\u003eThe NASA/GIMMS/3GV0 dataset provides Normalized Difference Vegetation Index (NDVI) data derived from NOAA's AVHRR sensors.\u003c/p\u003e\n"],["\u003cp\u003eIt offers global coverage at a 1/12-degree spatial resolution, spanning from July 1981 to December 2013.\u003c/p\u003e\n"],["\u003cp\u003eThis third-generation GIMMS NDVI dataset (NDVI3g) is publicly available and can be used without restrictions.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes NDVI and quality assurance (QA) bands, with the NDVI values ranging from -1 to 1.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze this dataset using Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["# GIMMS NDVI From AVHRR Sensors (3rd Generation)\n\nDataset Availability\n: 1981-07-01T00:00:00Z--2013-12-16T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA/NOAA](https://nex.nasa.gov/nex/projects/1349/)\n\nCadence\n: 15 Days\n\nTags\n:\n [avhrr](/earth-engine/datasets/tags/avhrr) [nasa](/earth-engine/datasets/tags/nasa) [ndvi](/earth-engine/datasets/tags/ndvi) [noaa](/earth-engine/datasets/tags/noaa) [vegetation](/earth-engine/datasets/tags/vegetation) [vegetation-indices](/earth-engine/datasets/tags/vegetation-indices) \ngimms \n\n#### Description\n\nGIMMS NDVI is generated from several NOAA's AVHRR sensors for a global\n1/12-degree lat/lon grid. The latest version of the GIMMS NDVI dataset\nis named NDVI3g (third generation GIMMS NDVI from AVHRR sensors).\n\n### Bands\n\n\n**Pixel Size**\n\n9277 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|--------|-----|-----|------------|-------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `ndvi` | -1 | 1 | meters | NDVI |\n| `qa` | | | meters | QA flag |\n| Bitmask for qa - Bits 0-2: QA flag values - 1: Good value - 2: Good value - 3: NDVI retrieved from spline interpolation - 4: NDVI retrieved from spline interpolation, possibly snow - 5: NDVI retrieved from average seasonal profile - 6: NDVI retrieved from average seasonal profile, possibly snow - 7: Missing data ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n### Terms of Use\n\n**Terms of Use**\n\nThis dataset is in the public domain and is available\nwithout restriction on use and distribution. See [NASA's\nEarth Science Data \\& Information Policy](https://www.earthdata.nasa.gov/engage/open-data-services-and-software/data-and-information-policy)\nfor additional information.\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('NASA/GIMMS/3GV0')\n .filter(ee.Filter.date('2013-06-01', '2013-12-31'));\nvar ndvi = dataset.select('ndvi');\nvar ndviVis = {\n min: -1.0,\n max: 1.0,\n palette: ['000000', 'f5f5f5', '119701'],\n};\nMap.setCenter(-88.6, 26.4, 1);\nMap.addLayer(ndvi, ndviVis, 'NDVI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GIMMS_3GV0) \n[GIMMS NDVI From AVHRR Sensors (3rd Generation)](/earth-engine/datasets/catalog/NASA_GIMMS_3GV0) \nGIMMS NDVI is generated from several NOAA's AVHRR sensors for a global 1/12-degree lat/lon grid. The latest version of the GIMMS NDVI dataset is named NDVI3g (third generation GIMMS NDVI from AVHRR sensors). \nNASA/GIMMS/3GV0, avhrr,nasa,ndvi,noaa,vegetation,vegetation-indices \n1981-07-01T00:00:00Z/2013-12-16T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://nex.nasa.gov/nex/projects/1349/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GIMMS_3GV0)"]]
