GIMMS NDVI از چندین حسگر AVHRR NOAA برای یک شبکه جهانی lat/lon 1/12 درجه تولید می‌شود. آخرین نسخه مجموعه داده GIMMS NDVI NDVI3g نام دارد (نسل سوم GIMMS NDVI از سنسورهای AVHRR).
باندها
اندازه پیکسل 9277 متر
باندها
نام
حداقل
حداکثر
اندازه پیکسل
توضیحات
ndvi
-1
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NDVI
qa
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پرچم QA
بیت ماسک برای qa
بیت 0-2: مقادیر پرچم QA
1: ارزش خوب
2: ارزش خوب
3: NDVI از درونیابی اسپلاین بازیابی شده است
4: NDVI بازیابی شده از درون یابی اسپلاین، احتمالاً برف
5: NDVI از نمایه متوسط فصلی بازیابی شده است
6: NDVI از نمایه متوسط فصلی، احتمالاً برف بازیابی شده است
GIMMS NDVI از چندین حسگر AVHRR NOAA برای یک شبکه جهانی lat/lon 1/12 درجه تولید می‌شود. آخرین نسخه مجموعه داده GIMMS NDVI NDVI3g نام دارد (نسل سوم GIMMS NDVI از سنسورهای AVHRR).
[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)"]]
