O produto de dados diário da Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) versão 1 é um produto mensal e global de 500 m com grade que contém informações de área queimada e qualidade por pixel. A abordagem de mapeamento de área queimada do VNP64 usa imagens do VIIRS de 750 m e observações de incêndio ativo do VIIRS de 750 m.
As bandas do VIIRS sensíveis e insensíveis à queima de biomassa são usadas para detectar mudanças causadas por incêndios e diferenciá-las de outros tipos de mudança.
Dia ordinal da queimada (1 a 366) para cada célula de grade de 500 m.
Burn_Date_Uncertainty
%
metros
Incerteza estimada na data da queimadura, em dias. Células não queimadas, não mapeadas e de grade de água são mascaradas.
QA
metros
Indicadores de controle de qualidade
Máscara de bits para controle de qualidade
Bit 0: estado de terra/água
0: célula de grade de água
1: célula de grade de terra
Bit 1: flag de dados válidos (0 = falso, 1 = verdadeiro). Um valor de 1 indica que havia dados válidos suficientes na série temporal de refletância para que a célula da grade fosse processada.
0: false
1: true
Bit 2: período de mapeamento abreviado (0 = falso, 1 = verdadeiro). Essa flag indica que o período de mapeamento confiável não abrange o período completo de um mês do produto.
0: false
1: true
Bit 3: a célula da grade foi rerotulada durante a fase de reotulação contextual do algoritmo (0 = falso, 1 = verdadeiro).
0: false
1: true
Bit 4: bit sobressalente definido como 0
0: bit extra
Bits 5 a 7: código de condição especial reservado para células da grade não queimadas. Esse código explica as células da grade que foram classificadas como não queimadas pelo algoritmo de detecção devido a circunstâncias especiais.
0: células de grade queimadas, não mapeadas ou de água
1: Observações válidas com espaçamento muito pequeno no tempo
2: poucas observações de treinamento ou separabilidade espectral insuficiente entre classes queimadas e não queimadas.
3: Data aparente da queimada nos limites da série temporal
4: Contaminação da água aparente
5: Ponto de acesso persistente
6: reservado para uso futuro
7: reservado para uso futuro
First_Day
metros
Primeiro dia do ano de detecção de mudanças confiável
Last_Day
metros
Último dia do ano de detecção de mudanças confiável
Termos de Uso
Termos de Uso
Os dados da NASA do LP DAAC são acessíveis sem custo financeiro. No entanto, quando um autor publica esses dados ou trabalhos baseados neles, é necessário citar os conjuntos de dados no texto da publicação e incluir uma referência a eles na lista de referências.
O produto de dados diário da Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) versão 1 é um produto mensal e global de 500 m com grade que contém informações de qualidade e área queimada por pixel. A abordagem de mapeamento de área queimada do VNP64 usa imagens do VIIRS de 750 m combinadas com imagens do VIIRS de 750 m…
[null,null,[],[[["\u003cp\u003eThe VNP64A1 dataset provides monthly, global, 500m resolution data on burned areas from 2014 to 2019.\u003c/p\u003e\n"],["\u003cp\u003eIt utilizes VIIRS imagery and active fire observations to detect and differentiate fire-induced changes from other land cover changes.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes information on burn date, uncertainty, quality assurance, and the period of reliable change detection.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access the data through NASA's Land Processes Distributed Active Archive Center (LP DAAC) and Google Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eProper citation is requested when publishing research based on this dataset, with links to relevant resources provided within the documentation.\u003c/p\u003e\n"]]],["The VNP64A1 dataset, provided by NASA LP DAAC, offers monthly global 500m gridded data on burned areas from 2014 to 2019. It uses VIIRS imagery and active fire observations to map burned areas and their quality, distinguishing fire-related changes from others. Data, available via Earth Engine, includes burn date, uncertainty, quality indicators, and detection period limits. The dataset's usage requires citing in any publication.\n"],null,["# VNP64A1: Burned Area Monthly L4 Global 500m SIN Grid\n\nDataset Availability\n: 2014-01-01T00:00:00Z--2019-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/VIIRS/VNP64A1.001)\n\nCadence\n: 30 Days\n\nTags\n:\n[burn](/earth-engine/datasets/tags/burn) [change-detection](/earth-engine/datasets/tags/change-detection) [fire](/earth-engine/datasets/tags/fire) [land](/earth-engine/datasets/tags/land) [nasa](/earth-engine/datasets/tags/nasa) [noaa](/earth-engine/datasets/tags/noaa) [surface](/earth-engine/datasets/tags/surface) [viirs](/earth-engine/datasets/tags/viirs) \n\n#### Description\n\nThe daily Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible\nInfrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) Version 1\ndata product is a monthly, global gridded 500m product containing per-pixel\nburned area and quality information. The VNP64 burned area mapping approach\nemploys 750m VIIRS imagery coupled with 750m VIIRS active fire\nobservations.\n\nVIIRS bands that are both sensitive and insensitive to biomass burning are\nused to detect changes caused by fire and to differentiate them from other\ntypes of change.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/1330/VNP64A1_User_Guide_V1.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/572/VNP64A1_ATBD_V1.pdf)\n\n- [General Documentation](https://lpdaac.usgs.gov/products/vnp64a1v001/)\n\n- [Land Product Quality Assessment website](https://landweb.modaps.eosdis.nasa.gov/browse?sensor=VIIRS&sat=SNPP)\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-------------------------|-------|------------|----------------------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Burn_Date` | | meters | Ordinal day of burn (1-366) for each 500-m grid cell. |\n| `Burn_Date_Uncertainty` | % | meters | Estimated uncertainty in date of burn, in days. Unburned, unmapped, and water grid cells are masked out. |\n| `QA` | | meters | Quality Assurance Indicators |\n| Bitmask for QA - Bit 0: land/water state - 0: water grid cell - 1: land grid cell - Bit 1: Valid data flag (0 = false, 1 = true). A value of 1 indicates that there was sufficient valid data in the reflectance time series for the grid cell to be processed. - 0: false - 1: true - Bit 2: Shortened mapping period (0 = false, 1 = true). This flag indicates that the period of reliable mapping does not encompass the full one-month product period. - 0: false - 1: true - Bit 3: Grid cell was relabeled during the contextual relabeling phase of the algorithm (0 = false, 1 = true). - 0: false - 1: true - Bit 4: Spare bit set to 0 - 0: Spare bit - Bits 5-7: Special condition code reserved for unburned grid cells. This code provides an explanation for any grid cells that were summarily classified as unburned by the detection algorithm due to special circumstances. - 0: burned, unmapped, or water grid cells - 1: Valid observations spaced too sparsely in time - 2: Too few training observations or insufficient spectral separability between burned and unburned classes. - 3: Apparent burn date at limits of time series - 4: Apparent water contamination - 5: Persistent hot spot - 6: Reserved for future use - 7: Reserved for future use ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `First_Day` | | meters | First day of the year of reliable change detection |\n| `Last_Day` | | meters | Last day of the year of reliable change detection |\n\n### Terms of Use\n\n**Terms of Use**\n\nLP DAAC NASA data are freely accessible; however, when an author\npublishes these data or works based on the data, it is requested that the\nauthor cite the datasets within the text of the publication and include a\nreference to them in the reference list.\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/VIIRS/VNP64A1.001\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 image = ee.Image('NOAA/VIIRS/001/VNP64A1/2018_12_01');\nvar visualization = {\n bands: ['Last_Day'],\n min: 250.0,\n max: 320.0,\n palette: [\n '000080', '0000d9', '4000ff', '8000ff', '0080ff', '00ffff',\n '00ff80', '80ff00', 'daff00', 'ffff00', 'fff500', 'ffda00',\n 'ffb000', 'ffa400', 'ff4f00', 'ff2500', 'ff0a00', 'ff00ff',\n ]\n};\n\nMap.setCenter(-119.13, 38.32, 8);\nMap.addLayer(image, visualization, 'Last day');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_VIIRS_001_VNP64A1) \n[VNP64A1: Burned Area Monthly L4 Global 500m SIN Grid](/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP64A1) \nThe daily Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) Version 1 data product is a monthly, global gridded 500m product containing per-pixel burned area and quality information. The VNP64 burned area mapping approach employs 750m VIIRS imagery coupled with 750m VIIRS ... \nNOAA/VIIRS/001/VNP64A1, burn,change-detection,fire,land,nasa,noaa,surface,viirs \n2014-01-01T00:00:00Z/2019-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/VIIRS/VNP64A1.001](https://doi.org/https://doi.org/10.5067/VIIRS/VNP64A1.001)\n- [https://doi.org/10.5067/VIIRS/VNP64A1.001](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP64A1)"]]
