Set data ini berisi Indeks Vegetasi Perbedaan Normal (NDVI) harian yang dikotak-kotakkan dan berasal dari NOAA Climate Data Record (CDR) of Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance. Catatan data mencakup
dari tahun 2014 dan seterusnya menggunakan data dari satelit
orbit kutub NOAA. Data diproyeksikan pada petak global 0,05 derajat x 0,05 derajat. Set data ini adalah salah satu produk CDR Permukaan Daratan yang dihasilkan oleh
NASA Goddard Space Flight Center (GSFC) dan University of Maryland
(UMD).
Masalah umum pada set data ini meliputi:
Variabel TIMEOFDAY berisi nilai yang terlalu besar sebanyak 1 hari
Nilai lintang tidak dikaitkan dengan benar dengan pusat sel petak, error < 0,002 derajat
Nilai bujur tidak dikaitkan dengan benar dengan pusat sel petak, error < 0,02 derajat
Catatan penyedia: pergeseran orbital N-19 (satelit NOAA terakhir yang membawa sensor AVHRR) mulai menurunkan kualitas produk yang diambil secara signifikan. Oleh karena itu, VIIRS kini menjadi sensor utama yang digunakan untuk produk-produk ini sejak tahun 2014 hingga saat ini.
Band
Ukuran Piksel 5566 meter
Band
Nama
Unit
Min
Maks
Skala
Ukuran Piksel
Deskripsi
NDVI
-9998*
9998*
0,0001
meter
Indeks vegetasi perbedaan yang dinormalisasi
TIMEOFDAY
j
0*
2.400*
0,01
meter
Jam sejak awal hari
QA
meter
Flag bit kontrol kualitas
Bitmask untuk QA
Bit 0: Tidak digunakan
0: Tidak
1: Ya
Bit 1: Piksel berawan
0: Tidak
1: Ya
Bit 2: Pixel berisi bayangan awan
0: Tidak
1: Ya
Bit 3: Pixel berada di atas air
0: Tidak
1: Ya
Bit 4: Pixel berada di atas pantulan sinar matahari
0: Tidak
1: Ya
Bit 5: Pixel berada di atas vegetasi gelap yang sangat padat
0: Tidak
1: Ya
Bit 6: Pixel pada malam hari (zenit matahari tinggi)
0: Tidak
1: Ya
Bit 7: Saluran 1-5 valid
0: Tidak
1: Ya
Bit 8: Nilai Channel 1 tidak valid
0: Tidak
1: Ya
Bit 9: Nilai Channel 2 tidak valid
0: Tidak
1: Ya
Bit 10: Nilai Channel 3 tidak valid
0: Tidak
1: Ya
Bit 11: Nilai Channel 4 tidak valid
0: Tidak
1: Ya
Bit 12: Nilai Channel 5 tidak valid
0: Tidak
1: Ya
Bit 13: Nilai RHO3 tidak valid
0: Tidak
1: Ya
Bit 14: Koreksi BRDF tidak valid
0: Tidak
1: Ya
Bit 15: Bendera kutub, garis lintang di atas 60 derajat (darat) atau 50 derajat (laut)
0: Tidak
1: Ya
* perkiraan nilai min atau maks
Properti Gambar
Properti Gambar
Nama
Jenis
Deskripsi
status
STRING
'provisional' atau 'permanent'
Persyaratan Penggunaan
Persyaratan Penggunaan
Titik distribusi resmi Program CDR NOAA untuk CDR adalah National Climatic Data Center NOAA yang menyediakan akses terbuka berkelanjutan dan pengelolaan data aktif paket CDR dan informasi terkait sesuai dengan kebijakan dan praktik data terbuka Amerika Serikat sebagaimana dijelaskan dalam Memorandum Presiden tentang "Kebijakan Data Terbuka" dan sesuai dengan Perintah Eksekutif 9 Mei 2013, "Menjadikan Data Terbuka dan yang Dapat Dibaca Mesin sebagai Standar Baru untuk Informasi Pemerintah". Sesuai dengan kebijakan ini, set data CDR bersifat tidak berpemilik, tersedia secara publik, dan tidak ada batasan yang diberlakukan atas penggunaannya. Untuk mengetahui informasi selengkapnya, lihat PDF
Penggunaan yang Wajar atas Set Data, Algoritma, dan Dokumentasi CDR NOAA.
Kutipan
Kutipan:
Kutip sebagai: Vermote, Eric; NOAA CDR Program. (2022): NOAA Climate Data Record
(CDR) of VIIRS Normalized Difference Vegetation Index (NDVI), Version 1.
[tunjukkan subset yang digunakan]. NOAA National Centers for Environmental Information.
https://doi.org/10.25921/gakh-st76
Set data ini berisi Indeks Vegetasi Perbedaan Normal (NDVI) harian yang dikotak-kotakkan yang berasal dari NOAA Climate Data Record (CDR) of Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance. Catatan data mencakup dari tahun 2014 dan seterusnya menggunakan data dari satelit orbit kutub NOAA. Data diproyeksikan pada 0,05 derajat x …
[null,null,[],[[["\u003cp\u003eThis dataset provides daily gridded Normalized Difference Vegetation Index (NDVI) data derived from the NOAA Climate Data Record (CDR) of Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance.\u003c/p\u003e\n"],["\u003cp\u003eThe data, sourced from NOAA polar-orbiting satellites, spans from January 1, 2014, to January 31, 2025, and is projected on a 0.05-degree global grid.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes bands for NDVI, time of day, and quality control, with a pixel size of 5566 meters.\u003c/p\u003e\n"],["\u003cp\u003eKnown issues include inaccuracies in the TIMEOFDAY variable and minor errors in latitude and longitude values related to the grid cell centers.\u003c/p\u003e\n"],["\u003cp\u003eThe data is nonproprietary and publicly accessible, with the primary sensor used being VIIRS since 2014, as outlined by the NOAA CDR Program.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2014-01-01T00:00:00Z--2025-08-22T00:00:00Z\n\nDataset Provider\n:\n\n\n [NOAA](https://www.ncei.noaa.gov/products/climate-data-records/normalized-difference-vegetation-index)\n\nCadence\n: 1 Day\n\nTags\n:\n[cdr](/earth-engine/datasets/tags/cdr) [daily](/earth-engine/datasets/tags/daily) [land](/earth-engine/datasets/tags/land) [ndvi](/earth-engine/datasets/tags/ndvi) [noaa](/earth-engine/datasets/tags/noaa) [vegetation-indices](/earth-engine/datasets/tags/vegetation-indices) [viirs](/earth-engine/datasets/tags/viirs) \n\nDescription \nThis dataset contains gridded daily Normalized Difference Vegetation Index\n(NDVI) derived from the NOAA Climate Data Record (CDR) of Visible Infrared\nImaging Radiometer Suite (VIIRS) Surface Reflectance. The data record spans\nfrom 2014 onward using data from NOAA polar orbiting\nsatellites. The data are projected on a 0.05 degree x 0.05 degree global\ngrid. This dataset is one of the Land Surface CDR products produced by the\nNASA Goddard Space Flight Center (GSFC) and the University of Maryland\n(UMD).\n\nKnown issues with this dataset include:\n\n- TIMEOFDAY variable contains values that are too large by 1 day\n\n- Latitude values are not correctly associated with the center of\n the grid cell, error is \\\u003c 0.002 degrees\n\n- Longitude values are not correctly associated with the center of\n the grid cell, error is \\\u003c 0.02 degrees\n\nSee [technical note from the data provider](https://www.ncei.noaa.gov/pub/data/sds/cdr/CDRs/Normalized_Difference_Vegetation_Index/VIIRS/AlgorithmDescriptionVIIRS_01B-20b.pdf).\n\nProvider's note: the orbital drift of N-19 (the last NOAA satellite\ncarrying the AVHRR sensor) began to severely degrade the retrieved\nproduct quality. Therefore, VIIRS is now the primary sensor being used for\nthese products from 2014-present.\n\nBands\n\n\n**Pixel Size**\n\n5566 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|-------------|-------|---------|--------|--------|------------|----------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `NDVI` | | -9998\\* | 9998\\* | 0.0001 | meters | Normalized difference vegetation index |\n| `TIMEOFDAY` | h | 0\\* | 2400\\* | 0.01 | meters | Hours since start of day |\n| `QA` | | | | | meters | Quality control bit flags |\n| Bitmask for QA - Bit 0: Unused - 0: No - 1: Yes - Bit 1: Pixel is cloudy - 0: No - 1: Yes - Bit 2: Pixel contains cloud shadow - 0: No - 1: Yes - Bit 3: Pixel is over water - 0: No - 1: Yes - Bit 4: Pixel is over sunglint - 0: No - 1: Yes - Bit 5: Pixel is over dense dark vegetation - 0: No - 1: Yes - Bit 6: Pixel is at night (high solar zenith) - 0: No - 1: Yes - Bit 7: Channels 1-5 are valid - 0: No - 1: Yes - Bit 8: Channel 1 value is invalid - 0: No - 1: Yes - Bit 9: Channel 2 value is invalid - 0: No - 1: Yes - Bit 10: Channel 3 value is invalid - 0: No - 1: Yes - Bit 11: Channel 4 value is invalid - 0: No - 1: Yes - Bit 12: Channel 5 value is invalid - 0: No - 1: Yes - Bit 13: RHO3 value is invalid - 0: No - 1: Yes - Bit 14: BRDF correction is invalid - 0: No - 1: Yes - Bit 15: Polar flag, latitude over 60 degrees (land) or 50 degrees (ocean) - 0: No - 1: Yes ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n\\* estimated min or max value\n\nImage Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|--------|--------|------------------------------|\n| status | STRING | 'provisional' or 'permanent' |\n\nTerms of Use\n\n**Terms of Use**\n\nThe NOAA CDR Program's official distribution point for CDRs is NOAA's\nNational Climatic Data Center which provides sustained, open access and\nactive data management of the CDR packages and related information in\nkeeping with the United States' open data policies and practices as\ndescribed in the President's Memorandum on \"Open Data Policy\" and pursuant\nto the Executive Order of May 9, 2013, \"Making Open and Machine Readable\nthe New Default for Government Information\". In line with these policies,\nthe CDR data sets are nonproprietary, publicly available, and no\nrestrictions are placed upon their use. For more information, see the\n[Fair Use of NOAA's CDR Data Sets, Algorithms and Documentation](https://www1.ncdc.noaa.gov/pub/data/sds/cdr/CDRs/Aerosol_Optical_Thickness/UseAgreement_01B-04.pdf)\npdf.\n\nCitations \nCitations:\n\n- Cite as: Vermote, Eric; NOAA CDR Program. (2022): NOAA Climate Data Record\n (CDR) of VIIRS Normalized Difference Vegetation Index (NDVI), Version 1.\n \\[indicate subset used\\]. NOAA National Centers for Environmental Information.\n [https://doi.org/10.25921/gakh-st76](https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C01677/html)\n\nDOIs\n\n- \u003chttps://doi.org/10.25921/gakh-st76\u003e\n\nExplore with Earth Engine **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\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('NOAA/CDR/VIIRS/NDVI/V1')\n .filter(ee.Filter.date('2018-05-01', '2018-06-01'));\nvar ndvi = dataset.select('NDVI');\nvar ndviVis = {\n min: -1000.0,\n max: 5000.0,\n palette: [\n 'ffffff', 'ce7e45', 'fcd163', 'c6ca02', '22cc04', '99b718', '207401',\n '012e01'\n ],\n};\nMap.setCenter(7.71, 17.93, 2);\nMap.addLayer(ndvi, ndviVis, 'NDVI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_CDR_VIIRS_NDVI_V1) \n[NOAA CDR VIIRS NDVI: Normalized Difference Vegetation Index, Version 1](/earth-engine/datasets/catalog/NOAA_CDR_VIIRS_NDVI_V1) \nThis dataset contains gridded daily Normalized Difference Vegetation Index (NDVI) derived from the NOAA Climate Data Record (CDR) of Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance. The data record spans from 2014 onward using data from NOAA polar orbiting satellites. The data are projected on a 0.05 degree x ... \nNOAA/CDR/VIIRS/NDVI/V1, cdr,daily,land,ndvi,noaa,vegetation-indices,viirs \n2014-01-01T00:00:00Z/2025-08-22T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.25921/gakh-st76](https://doi.org/https://www.ncei.noaa.gov/products/climate-data-records/normalized-difference-vegetation-index)\n- [https://doi.org/10.25921/gakh-st76](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_CDR_VIIRS_NDVI_V1)"]]
