O conjunto de dados subjacente para esse produto de Índice de Vegetação Aprimorado (EVI, na sigla em inglês) é composto por imagens do MODIS corrigidas por BRDF (MCD43B4), que foram preenchidas usando a abordagem descrita em Weiss et al. (2014) para eliminar dados ausentes causados por fatores como cobertura de nuvens. As saídas sem lacunas foram agregadas temporal e espacialmente para produzir o produto mensal de ≈5 km.
Esse conjunto de dados foi produzido por Harry Gibson e Daniel Weiss do Malaria Atlas Project (Big Data Institute, Universidade de Oxford, Reino Unido, https://malariaatlas.org/).
Bandas
Tamanho do pixel 5.000 metros
Bandas
Nome
Unidades
Mín.
Máx.
Tamanho do pixel
Descrição
Mean
0*
1*
metros
O valor médio do Índice de Vegetação Aprimorado para cada pixel agregado.
FilledProportion
%
0*
100*
metros
Uma faixa de controle de qualidade que indica a porcentagem de cada pixel resultante que foi composta de dados brutos (em vez de estimativas preenchidas por lacunas).
Weiss, D.J., P.M. Atkinson, S. Bhatt, B. Mappin, S.I. Hay & P.W. Gething
(2014) An effective approach for gap-filling continental scale remotely
sensed time-series. ISPRS Journal of Photogrammetry and Remote Sensing,
98, 106-118.
O conjunto de dados subjacente para esse produto de índice de vegetação aprimorado (EVI, na sigla em inglês) é a imagem corrigida por BRDF do MODIS (MCD43B4), que foi preenchida usando a abordagem descrita em Weiss et al. (2014) para eliminar dados ausentes causados por fatores como cobertura de nuvens. Em seguida, as saídas sem lacunas foram agregadas temporal e espacialmente para produzir o … mensal.
[null,null,[],[[["\u003cp\u003eThis dataset provides monthly Enhanced Vegetation Index (EVI) data from 2001-02-01 to 2015-06-01, derived from MODIS imagery and gap-filled for cloud cover.\u003c/p\u003e\n"],["\u003cp\u003eIt is produced by the Oxford Malaria Atlas Project and available at a 5km resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes a 'Mean' band representing EVI values and a 'FilledProportion' band indicating the percentage of raw data used in each pixel.\u003c/p\u003e\n"],["\u003cp\u003eData is licensed under CC-BY-NC-SA-4.0, requiring attribution, non-commercial use, and share-alike distribution.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze this dataset within Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["# Oxford MAP EVI: Malaria Atlas Project Gap-Filled Enhanced Vegetation Index\n\nDataset Availability\n: 2001-02-01T00:00:00Z--2015-06-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [Oxford Malaria Atlas Project](https://www.bdi.ox.ac.uk/research/malaria-atlas-project)\n\nCadence\n: 1 Month\n\nTags\n:\n[evi](/earth-engine/datasets/tags/evi) [map](/earth-engine/datasets/tags/map) [oxford](/earth-engine/datasets/tags/oxford) [vegetation](/earth-engine/datasets/tags/vegetation) [vegetation-indices](/earth-engine/datasets/tags/vegetation-indices) \n\n#### Description\n\nThe underlying dataset for this Enhanced Vegetation Index (EVI)\nproduct is MODIS BRDF-corrected imagery (MCD43B4), which was gap-filled\nusing the approach outlined in Weiss et al. (2014) to eliminate missing\ndata caused by factors such as cloud cover. Gap-free outputs were then\naggregated temporally and spatially to produce the monthly ≈5km product.\n\nThis dataset was produced by Harry Gibson and Daniel Weiss of the\nMalaria Atlas Project (Big Data Institute, University of Oxford,\nUnited Kingdom, \u003chttps://malariaatlas.org/\u003e).\n\n### Bands\n\n\n**Pixel Size**\n\n5000 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|--------------------|-------|-----|-------|------------|---------------------------------------------------------------------------------------------------------------------------------------------------|\n| `Mean` | | 0\\* | 1\\* | meters | The mean value of the Enhanced Vegetation Index for each aggregated pixel. |\n| `FilledProportion` | % | 0\\* | 100\\* | meters | A quality control band that indicates the percentage of each resulting pixel that was comprised of raw data (as opposed to gap-filled estimates). |\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-NC-SA-4.0](https://spdx.org/licenses/CC-BY-NC-SA-4.0.html)\n\n### Citations\n\nCitations:\n\n- Weiss, D.J., P.M. Atkinson, S. Bhatt, B. Mappin, S.I. Hay \\& P.W. Gething\n (2014) An effective approach for gap-filling continental scale remotely\n sensed time-series. ISPRS Journal of Photogrammetry and Remote Sensing,\n 98, 106-118.\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('Oxford/MAP/EVI_5km_Monthly')\n .filter(ee.Filter.date('2015-01-01', '2015-12-31'));\nvar evi = dataset.select('Mean');\nvar eviVis = {\n min: 0.0,\n max: 1.0,\n palette: [\n 'ffffff', 'fcd163', '99b718', '66a000', '3e8601', '207401', '056201',\n '004c00', '011301'\n ],\n};\nMap.setCenter(-60.5, -20.0, 2);\nMap.addLayer(evi, eviVis, 'EVI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/Oxford/Oxford_MAP_EVI_5km_Monthly) \n[Oxford MAP EVI: Malaria Atlas Project Gap-Filled Enhanced Vegetation Index](/earth-engine/datasets/catalog/Oxford_MAP_EVI_5km_Monthly) \nThe underlying dataset for this Enhanced Vegetation Index (EVI) product is MODIS BRDF-corrected imagery (MCD43B4), which was gap-filled using the approach outlined in Weiss et al. (2014) to eliminate missing data caused by factors such as cloud cover. Gap-free outputs were then aggregated temporally and spatially to produce the monthly ... \nOxford/MAP/EVI_5km_Monthly, evi,map,oxford,vegetation,vegetation-indices \n2001-02-01T00:00:00Z/2015-06-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.bdi.ox.ac.uk/research/malaria-atlas-project)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/Oxford_MAP_EVI_5km_Monthly)"]]
