L'ensemble de données Landsat Net Primary Production (NPP) CONUS estime la NPP à l'aide de la réflectance de surface Landsat pour CONUS. La production primaire nette (PPN) correspond à la quantité de carbone capturée par les plantes d'un écosystème, après prise en compte des pertes dues à la respiration. La NPP est calculée à l'aide de l'algorithme MOD17 (consultez le guide de l'utilisateur MOD17) avec la réflectance de surface Landsat, gridMET et la base de données nationale sur la couverture des sols.
Bracelets
Taille des pixels 30 mètres
Bandes de fréquences
Nom
Unités
Min
Max
Échelle
Taille des pixels
Description
annualNPP
kg*C/m^2
0
65535
0,0001
mètres
Production primaire nette annuelle
QC
%
0
255
mètres
Pourcentage de composites Landsat de 16 jours avec des données manquantes. Les lacunes sont dues à des données manquantes, à une forte contamination par les nuages et/ou à des pixels erronés.
Une valeur de 255 indique des données incomplètes en raison de l'échec de la méthode de remplissage des valeurs manquantes.
Conditions d'utilisation
Conditions d'utilisation
Cette œuvre appartient au domaine public et n'est soumise à aucune restriction connue en matière de droits d'auteur. Les utilisateurs doivent citer correctement la source utilisée pour créer des rapports et des publications à partir de cet ensemble de données, et indiquer la date à laquelle les données ont été acquises.
Citations
Citations :
Robinson, N.P., B.W. Allred, W.K. Smith, M.O. Jones, A. Moreno, T.A.
Erickson, D.E. Naugle, et S.W. Running. 2018. Production primaire terrestre pour les États-Unis contigus, dérivée de Landsat 30 m et MODIS 250 m. Remote Sensing in Ecology and Conservation.
doi:10.1002/rse2.74
L'ensemble de données Landsat Net Primary Production (NPP) CONUS estime la production primaire nette (PPN) à l'aide de la réflectance de surface Landsat pour les États-Unis contigus. La production primaire nette correspond à la quantité de carbone capturée par les plantes d'un écosystème, après déduction des pertes dues à la respiration. La production primaire nette est calculée à l'aide de l'algorithme MOD17 (voir le guide de l'utilisateur MOD17) avec la réflectance de surface Landsat, …
[null,null,[],[[["\u003cp\u003eThe Landsat Net Primary Production (NPP) CONUS dataset estimates annual net primary production (NPP) for the conterminous United States from 1986 to 2020.\u003c/p\u003e\n"],["\u003cp\u003eNPP, the net amount of carbon captured by plants, is calculated using the MOD17 algorithm with Landsat, gridMET, and NLCD data.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is provided at 30-meter resolution and includes an annual NPP band and a quality control band.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is in the public domain and free of known copyright restrictions.\u003c/p\u003e\n"],["\u003cp\u003eThe University of Montana Numerical Terradynamic Simulation Group (NTSG) provides the dataset.\u003c/p\u003e\n"]]],["The Landsat Net Primary Production (NPP) CONUS dataset, provided by the University of Montana NTSG, spans from 1986 to 2020. It offers yearly estimates of NPP, representing carbon captured by plants, calculated using the MOD17 algorithm with Landsat data, gridMET, and the National Land Cover Database. Data is available via an Earth Engine snippet (`ee.ImageCollection(\"UMT/NTSG/v2/LANDSAT/NPP\")`) and includes bands for `annualNPP` (kg\\*C/m\\^2) and `QC`. The dataset is public domain, with a citation requirement.\n"],null,["# Landsat Net Primary Production CONUS\n\nDataset Availability\n: 1986-01-01T00:00:00Z--2020-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [University of Montana Numerical Terradynamic Simulation Group (NTSG)](https://www.ntsg.umt.edu/project/landsat/landsat-productivity.php)\n\nCadence\n: 1 Year\n\nTags\n:\n[conus](/earth-engine/datasets/tags/conus) [gridmet-derived](/earth-engine/datasets/tags/gridmet-derived) [landsat](/earth-engine/datasets/tags/landsat) [mod17](/earth-engine/datasets/tags/mod17) [nlcd-derived](/earth-engine/datasets/tags/nlcd-derived) [npp](/earth-engine/datasets/tags/npp) [photosynthesis](/earth-engine/datasets/tags/photosynthesis) [plant-productivity](/earth-engine/datasets/tags/plant-productivity) [production](/earth-engine/datasets/tags/production) [productivity](/earth-engine/datasets/tags/productivity) [yearly](/earth-engine/datasets/tags/yearly) \n\n#### Description\n\nThe Landsat Net Primary Production (NPP) CONUS dataset estimates NPP using\nLandsat Surface Reflectance for CONUS. NPP is the amount of\ncarbon captured by plants in an ecosystem, after accounting for losses due to\nrespiration. NPP is calculated using the MOD17 algorithm (see [MOD17 User\nGuide](https://www.ntsg.umt.edu/files/modis/MOD17UsersGuide2015_v3.pdf)) with\nLandsat Surface Reflectance, gridMET, and the National Land Cover Database.\n\n### Bands\n\n\n**Pixel Size**\n\n30 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|-------------|------------|-----|-------|--------|------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `annualNPP` | kg\\*C/m\\^2 | 0 | 65535 | 0.0001 | meters | Annual net primary production |\n| `QC` | % | 0 | 255 | | meters | Percentage of gap-filled Landsat 16-day composites. Gaps are caused by missing data, high cloud contamination, and/or erroneous pixels. A value of 255 indicates incomplete data due to failure of the gap-filling method. |\n\n### Terms of Use\n\n**Terms of Use**\n\nThis work is in the public domain and is free of known copyright\nrestrictions. Users should properly cite the source used in the creation of\nany reports and publications resulting from the use of this dataset and note\nthe date when the data was acquired.\n\n### Citations\n\nCitations:\n\n- Robinson, N.P., B.W. Allred, W.K. Smith, M.O. Jones, A. Moreno, T.A.\n Erickson, D.E. Naugle, and S.W. Running. 2018. Terrestrial primary\n production for the conterminous United States derived from Landsat 30 m and\n MODIS 250 m. Remote Sensing in Ecology and Conservation.\n [doi:10.1002/rse2.74](https://doi.org/10.1002/rse2.74)\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('UMT/NTSG/v2/LANDSAT/NPP')\n .filter(ee.Filter.date('2016-01-01', '2016-12-31'));\nvar npp = dataset.select('annualNPP');\nvar nppVis = {\n min: 0.0,\n max: 20000.0,\n palette: ['bbe029', '0a9501', '074b03'],\n};\nMap.setCenter(-98.26, 39.32, 5);\nMap.addLayer(npp, nppVis, 'NPP');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/UMT/UMT_NTSG_v2_LANDSAT_NPP) \n[Landsat Net Primary Production CONUS](/earth-engine/datasets/catalog/UMT_NTSG_v2_LANDSAT_NPP) \nThe Landsat Net Primary Production (NPP) CONUS dataset estimates NPP using Landsat Surface Reflectance for CONUS. NPP is the amount of carbon captured by plants in an ecosystem, after accounting for losses due to respiration. NPP is calculated using the MOD17 algorithm (see MOD17 User Guide) with Landsat Surface Reflectance, ... \nUMT/NTSG/v2/LANDSAT/NPP, conus,gridmet-derived,landsat,mod17,nlcd-derived,npp,photosynthesis,plant-productivity,production,productivity,yearly \n1986-01-01T00:00:00Z/2020-01-01T00:00:00Z \n24.42 -124.84 49.72 -64.82 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.ntsg.umt.edu/project/landsat/landsat-productivity.php)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/UMT_NTSG_v2_LANDSAT_NPP)"]]
