Il prodotto MOD17A3HGF V6.1 fornisce informazioni sulla produttività primaria lorda e netta annua (GPP e NPP) con una risoluzione di 500 m per pixel. L'NPP annuale è
derivato dalla somma di tutti i prodotti di fotosintesi netta(PSN) di 8 giorni
(MOD17A2H) dell'anno in questione. Il valore PSN è la differenza tra la
produttività primaria lorda (GPP) e la respirazione di mantenimento (MR)
(GPP-MR).
Bande
Dimensioni in pixel 500 metri
Bande
Nome
Unità
Min
Max
Scala
Dimensioni dei pixel
Descrizione
Gpp
kg*C/m^2
0
65500
0,0001
metri
Produttività primaria lorda
Npp
kg*C/m^2
-30000
32700
0,0001
metri
Produttività primaria netta
Npp_QC
%
0
100
metri
Percentuale di controllo qualità
Termini e condizioni d'uso
Termini e condizioni d'uso
I dati e i prodotti MODIS acquisiti tramite l'LP DAAC
non hanno restrizioni per l'utilizzo, la vendita o la ridistribuzione successivi.
Il prodotto MOD17A3HGF V6.1 fornisce informazioni sulla produttività primaria lorda e netta (GPP e NPP) annuale con una risoluzione di 500 metri per pixel. L'NPP annuale è derivato dalla somma di tutti i prodotti di fotosintesi netta(PSN) di 8 giorni (MOD17A2H) dell'anno in questione. Il valore PSN è la differenza tra la produttività primaria lorda (GPP)…
[null,null,[],[[["\u003cp\u003eThe MOD17A3HGF V6.1 product provides annual Gross and Net Primary Productivity (GPP and NPP) data at 500m resolution.\u003c/p\u003e\n"],["\u003cp\u003eNPP is calculated from the sum of 8-day Net Photosynthesis (PSN) values, which are derived from GPP and Maintenance Respiration (MR).\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from 2001 to 2023 and is available globally.\u003c/p\u003e\n"],["\u003cp\u003eData is freely accessible for use, sale, and redistribution with proper citation to the LP DAAC.\u003c/p\u003e\n"],["\u003cp\u003eEarth Engine provides tools for analyzing and visualizing this dataset.\u003c/p\u003e\n"]]],["The MOD17A3HGF V6.1 dataset, provided by NASA LP DAAC, offers annual Gross and Net Primary Productivity (GPP and NPP) data from 2001 to 2024, at a 500m resolution. NPP is calculated from 8-day Net Photosynthesis (PSN) products (GPP-MR). The data includes `Gpp`, `Npp`, and `Npp_QC` bands. It is accessible through Google Earth Engine using the code snippet `ee.ImageCollection(\"MODIS/061/MOD17A3HGF\")`. Data is free for use, sale, or redistribution.\n"],null,["# MOD17A3HGF.061: Terra Net Primary Production Gap-Filled Yearly Global 500m\n\nDataset Availability\n: 2001-01-01T00:00:00Z--2024-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MOD17A3HGF.061)\n\nCadence\n: 1 Year\n\nTags\n:\n[global](/earth-engine/datasets/tags/global) [gpp](/earth-engine/datasets/tags/gpp) [nasa](/earth-engine/datasets/tags/nasa) [npp](/earth-engine/datasets/tags/npp) [photosynthesis](/earth-engine/datasets/tags/photosynthesis) [plant-productivity](/earth-engine/datasets/tags/plant-productivity) [productivity](/earth-engine/datasets/tags/productivity) [psn](/earth-engine/datasets/tags/psn) [terra](/earth-engine/datasets/tags/terra) [usgs](/earth-engine/datasets/tags/usgs) [yearly](/earth-engine/datasets/tags/yearly) \n\n#### Description\n\nThe MOD17A3HGF V6.1 product provides information about annual Gross and Net\nPrimary Productivity (GPP and NPP) at 500m pixel resolution. Annual NPP is\nderived from the sum of all 8-day Net Photosynthesis(PSN) products\n(MOD17A2H) from the given year. The PSN value is the difference of the\nGross Primary Productivity (GPP) and the Maintenance Respiration (MR)\n(GPP-MR).\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|----------|------------|--------|-------|--------|------------|----------------------------|\n| `Gpp` | kg\\*C/m\\^2 | 0 | 65500 | 0.0001 | meters | Gross primary productivity |\n| `Npp` | kg\\*C/m\\^2 | -30000 | 32700 | 0.0001 | meters | Net primary productivity |\n| `Npp_QC` | % | 0 | 100 | | meters | Quality control percentage |\n\n### Terms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC\nhave no restrictions on subsequent use, sale, or redistribution.\n\n### Citations\n\nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\n\n### DOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MOD17A3HGF.061\u003e\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/061/MOD17A3HGF');\n\nvar visualization = {\n bands: ['Npp'],\n min: 0,\n max: 19000,\n palette: ['bbe029', '0a9501', '074b03']\n};\n\nMap.setCenter(6.746, 46.529, 3);\n\nMap.addLayer(dataset, visualization, 'NPP');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MOD17A3HGF) \n[MOD17A3HGF.061: Terra Net Primary Production Gap-Filled Yearly Global 500m](/earth-engine/datasets/catalog/MODIS_061_MOD17A3HGF) \nThe MOD17A3HGF V6.1 product provides information about annual Gross and Net Primary Productivity (GPP and NPP) at 500m pixel resolution. Annual NPP is derived from the sum of all 8-day Net Photosynthesis(PSN) products (MOD17A2H) from the given year. The PSN value is the difference of the Gross Primary Productivity (GPP) ... \nMODIS/061/MOD17A3HGF, global,gpp,nasa,npp,photosynthesis,plant-productivity,productivity,psn,terra,usgs,yearly \n2001-01-01T00:00:00Z/2024-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MOD17A3HGF.061](https://doi.org/https://doi.org/10.5067/MODIS/MOD17A3HGF.061)\n- [https://doi.org/10.5067/MODIS/MOD17A3HGF.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD17A3HGF)"]]
