Produk Terra MODIS Vegetation Continuous Fields (VCF) adalah representasi tingkat sub-piksel dari perkiraan tutupan vegetasi permukaan secara global. Dirancang untuk terus merepresentasikan permukaan terestrial Bumi sebagai proporsi sifat vegetasi dasar, indeks ini memberikan gradasi tiga komponen penutup permukaan: persentase tutupan pohon, persentase tutupan non-pohon, dan persentase lahan kosong.
Produk VCF memberikan gambaran kuantitatif yang berkelanjutan tentang cakupan permukaan lahan dengan detail spasial yang lebih baik, sehingga banyak digunakan dalam aplikasi pemodelan dan pemantauan lingkungan.
Produk VCF yang dihasilkan setiap tahun ini dibuat menggunakan komposit bulanan data Reflektansi Permukaan Tanah Terra MODIS 250 dan 500 meter, termasuk ketujuh band, dan Suhu Permukaan Tanah.
Persen piksel yang ditutupi oleh vegetasi non-pohon
Percent_NonVegetated
%
0
100
meter
Persen piksel yang tidak ditumbuhi vegetasi
Quality
meter
Mendeskripsikan input yang memiliki kualitas buruk (berawan, aerosol tinggi, bayangan awan, atau zenit tampilan >45°). Setiap bit dalam kolom mewakili 1 dari 8 file reflektansi permukaan input ke model.
Bitmask untuk Kualitas
Bit 0: Status lapisan input DOY 065-097
0: Hapus
1: Buruk
Bit 1: Status lapisan input DOY 113-145
0: Hapus
1: Buruk
Bit 2: Status lapisan input DOY 161-193
0: Hapus
1: Buruk
Bit 3: Status lapisan input DOY 209-241
0: Hapus
1: Buruk
Bit 4: Status lapisan input DOY 257-289
0: Hapus
1: Buruk
Bit 5: Status lapisan input DOY 305-337
0: Hapus
1: Buruk
Bit 6: Status lapisan input DOY 353-017
0: Hapus
1: Buruk
Bit 7: Status lapisan input DOY 033-045
0: Hapus
1: Buruk
Percent_Tree_Cover_SD
%
0
32767
0,01
meter
Simpangan baku (SD) dari 30 model yang
digunakan untuk menghasilkan nilai piksel dalam lapisan data
persentase tutupan pohon
Percent_NonVegetated_SD
%
0
32767
0,01
meter
Simpangan baku (SD) dari 30 model yang digunakan untuk menghasilkan nilai piksel dalam lapisan data persentase non-vegetasi
Cloud
meter
Memperjelas lapisan 'Kualitas' untuk memberi pengguna indikasi bahwa data 'buruk' mengacu pada data input yang tidak jelas. Setiap bit dalam kolom mewakili 1 dari 8 file reflektansi permukaan input ke model.
Bitmask untuk Cloud
Bit 0: Status lapisan input DOY 065-097
0: Hapus
1: Berawan
Bit 1: Status lapisan input DOY 113-145
0: Hapus
1: Berawan
Bit 2: Status lapisan input DOY 161-193
0: Hapus
1: Berawan
Bit 3: Status lapisan input DOY 209-241
0: Hapus
1: Berawan
Bit 4: Status lapisan input DOY 257-289
0: Hapus
1: Berawan
Bit 5: Status lapisan input DOY 305-337
0: Hapus
1: Berawan
Bit 6: Status lapisan input DOY 353-017
0: Hapus
1: Berawan
Bit 7: Status lapisan input DOY 033-045
0: Hapus
1: Berawan
Persyaratan Penggunaan
Persyaratan Penggunaan
Data dan produk MODIS yang diperoleh melalui LP DAAC tidak memiliki batasan pada penggunaan, penjualan, atau redistribusi berikutnya.
Produk Terra MODIS Vegetation Continuous Fields (VCF) adalah representasi tingkat sub-piksel dari perkiraan tutupan vegetasi permukaan secara global. Dirancang untuk terus-menerus merepresentasikan permukaan terestrial Bumi sebagai proporsi sifat vegetasi dasar, peta ini memberikan gradasi tiga komponen penutup permukaan: persentase penutup pohon, persentase penutup non-pohon, dan persentase lahan kosong. …
[null,null,[],[],["The Terra MODIS VCF product, available from 2000-03-05 to 2023-03-06 via NASA LP DAAC, offers yearly global vegetation cover data. It uses 250-meter resolution to estimate percent tree cover, non-tree vegetation, and bare ground. Data is derived from Terra MODIS Land Surface Reflectance. The product includes quality and cloud data indicators. Access to use is through google Earth engine, with JavaScript code examples for visualization.\n"],null,["# MOD44B.061 Terra Vegetation Continuous Fields Yearly Global 250m\n\nDataset Availability\n: 2000-03-05T00:00:00Z--2024-03-05T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MOD44B.006)\n\nCadence\n: 1 Year\n\nTags\n:\n [annual](/earth-engine/datasets/tags/annual) [geophysical](/earth-engine/datasets/tags/geophysical) [global](/earth-engine/datasets/tags/global) [landuse-landcover](/earth-engine/datasets/tags/landuse-landcover) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [terra](/earth-engine/datasets/tags/terra) [tree-cover](/earth-engine/datasets/tags/tree-cover) [vegetation](/earth-engine/datasets/tags/vegetation) \nmod44b \n\n#### Description\n\nThe Terra MODIS Vegetation Continuous Fields (VCF)\nproduct is a sub-pixel-level representation of surface vegetation\ncover estimates globally. Designed to continuously represent\nEarth's terrestrial surface as a proportion of basic vegetation\ntraits, it provides a gradation of three surface cover components:\npercent tree cover, percent non-tree cover, and percent bare.\nVCF products provide a continuous, quantitative portrayal of\nland surface cover with improved spatial detail, and hence, are\nwidely used in environmental modeling and monitoring applications.\n\nGenerated yearly, the VCF product is produced using monthly\ncomposites of Terra MODIS 250 and 500 meters Land Surface Reflectance\ndata, including all seven bands, and Land Surface Temperature.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/1494/MOD44B_User_Guide_V61.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/113/MOD44B_ATBD.pdf)\n\n- [General Documentation](https://lpdaac.usgs.gov/products/mod44bv061/)\n\n### Bands\n\n\n**Pixel Size**\n\n250 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|------------------------------|-------|-----|-------|-------|------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Percent_Tree_Cover` | % | 0 | 100 | | meters | Percent of a pixel which is covered by tree canopy |\n| `Percent_NonTree_Vegetation` | % | 0 | 100 | | meters | Percent of a pixel which is covered by non-tree vegetation |\n| `Percent_NonVegetated` | % | 0 | 100 | | meters | Percent of a pixel which is not vegetated |\n| `Quality` | | | | | meters | Describes those inputs that had poor quality (cloudy, high aerosol, cloud shadow, or view zenith \\\u003e45°). Each bit in the field represents 1 out of 8 input surface reflectance files to the model. |\n| Bitmask for Quality - Bit 0: State of input layers DOY 065-097 - 0: Clear - 1: Bad - Bit 1: State of input layers DOY 113-145 - 0: Clear - 1: Bad - Bit 2: State of input layers DOY 161-193 - 0: Clear - 1: Bad - Bit 3: State of input layers DOY 209-241 - 0: Clear - 1: Bad - Bit 4: State of input layers DOY 257-289 - 0: Clear - 1: Bad - Bit 5: State of input layers DOY 305-337 - 0: Clear - 1: Bad - Bit 6: State of input layers DOY 353-017 - 0: Clear - 1: Bad - Bit 7: State of input layers DOY 033-045 - 0: Clear - 1: Bad ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `Percent_Tree_Cover_SD` | % | 0 | 32767 | 0.01 | meters | Standard deviation (SD) of the 30 models that were used to generate the pixel value in the percent tree cover data layer |\n| `Percent_NonVegetated_SD` | % | 0 | 32767 | 0.01 | meters | Standard deviation (SD) of the 30 models that were used to generate the pixel value in the percent non-vegetated data layer |\n| `Cloud` | | | | | meters | Clarifies the 'Quality' layer to give the user an indication that the 'bad' data refers to cloudy input data. Each bit in the field represents 1 out of 8 input surface reflectance files to the model. |\n| Bitmask for Cloud - Bit 0: State of input layers DOY 065-097 - 0: Clear - 1: Cloudy - Bit 1: State of input layers DOY 113-145 - 0: Clear - 1: Cloudy - Bit 2: State of input layers DOY 161-193 - 0: Clear - 1: Cloudy - Bit 3: State of input layers DOY 209-241 - 0: Clear - 1: Cloudy - Bit 4: State of input layers DOY 257-289 - 0: Clear - 1: Cloudy - Bit 5: State of input layers DOY 305-337 - 0: Clear - 1: Cloudy - Bit 6: State of input layers DOY 353-017 - 0: Clear - 1: Cloudy - Bit 7: State of input layers DOY 033-045 - 0: Clear - 1: Cloudy ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\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### 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/MOD44B')\n .filter(ee.Filter.date('2000-01-01', '2001-01-01'));\n\nvar visualization = {\n bands: ['Percent_Tree_Cover'],\n min: 0,\n max: 100,\n palette: ['bbe029', '0a9501', '074b03']\n};\n\nMap.setCenter(6.746, 46.529, 3);\n\nMap.addLayer(dataset, visualization, 'Percent Tree Cover');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MOD44B) \n[MOD44B.061 Terra Vegetation Continuous Fields Yearly Global 250m](/earth-engine/datasets/catalog/MODIS_061_MOD44B) \nThe Terra MODIS Vegetation Continuous Fields (VCF) product is a sub-pixel-level representation of surface vegetation cover estimates globally. Designed to continuously represent Earth's terrestrial surface as a proportion of basic vegetation traits, it provides a gradation of three surface cover components: percent tree cover, percent non-tree cover, and percent bare. ... \nMODIS/061/MOD44B, annual,geophysical,global,landuse-landcover,modis,nasa,terra,tree-cover,vegetation \n2000-03-05T00:00:00Z/2024-03-05T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://doi.org/10.5067/MODIS/MOD44B.006)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD44B)"]]
