Produk data harian Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible
Infrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) Versi 1
adalah produk bulanan dengan grid global 500 m yang berisi informasi kualitas dan
area terbakar per piksel. Pendekatan pemetaan area terbakar VNP64
menggunakan gambar VIIRS 750 m yang dipadukan dengan pengamatan
kebakaran aktif VIIRS 750 m.
Band VIIRS yang sensitif dan tidak sensitif terhadap pembakaran biomassa digunakan untuk mendeteksi perubahan yang disebabkan oleh kebakaran dan membedakannya dari jenis perubahan lainnya.
Hari ordinal kebakaran (1-366) untuk setiap sel petak 500 m.
Burn_Date_Uncertainty
%
meter
Perkiraan ketidakpastian dalam tanggal kebakaran, dalam hari. Sel petak yang tidak terbakar, tidak dipetakan, dan petak air akan disamarkan.
QA
meter
Indikator Jaminan Kualitas
Bitmask untuk QA
Bit 0: status daratan/perairan
0: sel petak air
1: sel petak darat
Bit 1: Tanda data valid (0 = salah, 1 = benar). Nilai 1 menunjukkan
bahwa ada data valid yang cukup dalam deret waktu pantulan
agar sel petak dapat diproses.
0: salah
1: benar
Bit 2: Periode pemetaan yang diperpendek (0 = salah, 1 = benar). Flag ini menunjukkan bahwa periode pemetaan yang andal tidak mencakup periode produk satu bulan penuh.
0: salah
1: benar
Bit 3: Sel petak diberi label ulang selama fase pemberian label ulang kontekstual
algoritma (0 = salah, 1 = benar).
0: salah
1: benar
Bit 4: Bit cadangan ditetapkan ke 0
0: Mata bor cadangan
Bit 5-7: Kode kondisi khusus yang dicadangkan untuk sel petak yang tidak terbakar. Kode ini memberikan penjelasan untuk sel petak yang diklasifikasikan secara ringkas sebagai tidak terbakar oleh algoritma deteksi karena keadaan khusus.
0: sel petak yang terbakar, tidak dipetakan, atau berisi air
1: Pengamatan valid yang terlalu jarang dalam waktu
2: Terlalu sedikit pengamatan pelatihan atau pemisahan spektral yang tidak memadai antara kelas terbakar dan tidak terbakar.
3: Tanggal pembakaran yang jelas pada batas deret waktu
4: Kontaminasi air yang terlihat jelas
5: Hotspot persisten
6: Dipesan untuk penggunaan di masa mendatang
7: Dipesan untuk penggunaan di masa mendatang
First_Day
meter
Hari pertama tahun deteksi perubahan yang andal
Last_Day
meter
Hari terakhir tahun deteksi perubahan yang andal
Persyaratan Penggunaan
Persyaratan Penggunaan
Data NASA LP DAAC dapat diakses secara bebas; namun, saat penulis memublikasikan data ini atau karya yang didasarkan pada data tersebut, penulis diminta untuk mengutip set data dalam teks publikasi dan menyertakan referensi ke set data tersebut dalam daftar referensi.
Produk data harian Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Burned Area (VNP64A1) Versi 1 adalah produk 500 m yang dikotak-kotakkan secara global setiap bulan yang berisi informasi kualitas dan area terbakar per piksel. Pendekatan pemetaan area terbakar VNP64 menggunakan gambar VIIRS 750 m yang dipadukan dengan VIIRS 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)"]]
