Bu veriler, 16 Mart 1984 ile 31 Aralık 2021 arasında elde edilen Landsat 5, 7 ve 8'den alınan 4.716.475 sahne kullanılarak oluşturulmuştur.
Her piksel, bir uzman sistemi kullanılarak su / su olmayan şeklinde ayrı ayrı sınıflandırıldı ve sonuçlar, tüm dönem için aylık bir geçmişte ve değişiklik algılama amacıyla iki dönem (1984-1999, 2000-2021) için derlendi.
Aylık Tekrarlama koleksiyonu 12 resim içerir: Tüm yıllar boyunca o ayda tespit edilen oluşum değerlerine göre suyun mevsimselliğinin aylık ölçümleri.
Bantlar
Piksel Boyutu 30 metre
Bantlar
Ad
Birimler
Min.
Maks.
Piksel Boyutu
Açıklama
monthly_recurrence
%
0
100
metre
Bu ay için yüzde olarak ifade edilen yinelenme değeri.
has_observations
metre
Ayda gözlem olup olmadığını gösteren işaret.
has_observations için bit maskesi
Bit 0: Ayın gözlemleri.
0: Geçerli gözlem yok
1: En az 1 geçerli gözlem vardı
Resim Özellikleri
Resim Özellikleri
Ad
Tür
Açıklama
ay
ÇİFT
Ay
Kullanım Şartları
Kullanım Şartları
Buradaki tüm veriler Copernicus Programı kapsamında üretilir ve ücretsiz olarak, kullanım kısıtlaması olmadan sağlanır. Lisansla ilgili tüm bilgiler için Copernicus Yönetmeliği'ne bakın.
Bu veri kümelerini kullanan yayınlar, modeller ve veri ürünleri, veri kümelerini ve dergi makalesini aşağıdaki alıntıdaki gibi alıntılamak da dahil olmak üzere uygun bir teşekkür içermelidir.
Verileri yayınlanmış bir haritada katman olarak kullanıyorsanız lütfen şu atıf metnini ekleyin: "Kaynak: EC JRC/Google"
Alıntılar
Alıntılar:
Jean-Francois Pekel, Andrew Cottam, Noel Gorelick, Alan S. Belward,
Küresel yüzey suyunun ve uzun vadeli değişikliklerinin yüksek çözünürlüklü haritası.
Nature 540, 418-422 (2016). (doi:10.1038/nature20584)
Bu veri kümesi, 1984-2021 yılları arasındaki yüzey suyunun konum ve zamansal dağılımına ilişkin haritaları içerir ve bu su yüzeylerinin kapsamı ve değişimi hakkında istatistikler sunar. Daha fazla bilgi için ilgili makalelere göz atın: High-resolution mapping of global surface water and its long-term changes (Nature, 2016) ve …
[null,null,[],[[["\u003cp\u003eThis dataset provides monthly maps of surface water occurrence from 1984 to 2021, derived from Landsat 5, 7, and 8 imagery.\u003c/p\u003e\n"],["\u003cp\u003eIt offers insights into the location, distribution, and changes in global surface water over time.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes monthly recurrence data, indicating the percentage of time water was present in each location for a given month.\u003c/p\u003e\n"],["\u003cp\u003eData is freely available for use with proper attribution to EC JRC/Google and citation of the associated journal article.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze this dataset using Google Earth Engine.\u003c/p\u003e\n"]]],["This dataset, provided by EC JRC/Google, maps global surface water distribution and changes from March 1984 to December 2021. Derived from over 4.7 million Landsat scenes, each pixel is classified as water or non-water. The data is compiled into a monthly history and two epochs (1984-1999, 2000-2021) for change analysis. The monthly recurrence collection contains data on water seasonality and whether a month has observations, with a pixel size of 30 meters.\n"],null,["# JRC Monthly Water Recurrence, v1.4\n\nDataset Availability\n: 1984-03-16T00:00:00Z--2022-01-01T00:00:00Z\n\nDataset Provider\n:\n\n\n [EC JRC / Google](https://global-surface-water.appspot.com)\n\nClimatological Interval\n: 1 Month\n\nTags\n:\n [geophysical](/earth-engine/datasets/tags/geophysical) [google](/earth-engine/datasets/tags/google) [history](/earth-engine/datasets/tags/history) [jrc](/earth-engine/datasets/tags/jrc) [landsat-derived](/earth-engine/datasets/tags/landsat-derived) [monthly](/earth-engine/datasets/tags/monthly) [surface](/earth-engine/datasets/tags/surface) [surface-ground-water](/earth-engine/datasets/tags/surface-ground-water) [water](/earth-engine/datasets/tags/water) \nrecurrence \n\n#### Description\n\nThis dataset contains maps of the location and temporal\ndistribution of surface water from 1984 to 2021 and provides\nstatistics on the extent and change of those water surfaces.\nFor more information see the associated journal article: [High-resolution\nmapping of global surface water and its long-term changes](https://www.nature.com/nature/journal/v540/n7633/full/nature20584.html)\n(Nature, 2016) and the online\n[Data Users Guide](https://storage.googleapis.com/global-surface-water/downloads_ancillary/DataUsersGuidev2021.pdf).\n\nThese data were generated using 4,716,475 scenes from Landsat\n5, 7, and 8 acquired between 16 March 1984 and 31 December 2021.\nEach pixel was individually classified into water / non-water\nusing an expert system and the results were collated into a monthly\nhistory for the entire time period and two epochs (1984-1999,\n2000-2021) for change detection.\n\nThe Monthly Recurrence collection contains 12 images: monthly measures of\nthe seasonality of water based on the occurrence values detected in that\nmonth over all years.\n\n### Bands\n\n\n**Pixel Size**\n\n30 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|----------------------|-------|-----|-----|------------|----------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `monthly_recurrence` | % | 0 | 100 | meters | The recurrence value expressed as a percentage for this month. |\n| `has_observations` | | | | meters | A flag to indicate if the month has observations. |\n| Bitmask for has_observations - Bit 0: Observations for the month. - 0: No valid observations - 1: At least 1 valid observation was available ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n### Image Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|-------|--------|-------------|\n| month | DOUBLE | Month |\n\n### Terms of Use\n\n**Terms of Use**\n\nAll data here is produced under the Copernicus Programme and is provided\nfree of charge, without restriction of use. For the full license\ninformation see the Copernicus Regulation.\n\nPublications, models, and data products that make use of these datasets\nmust include proper acknowledgement, including citing datasets and the\njournal article as in the following citation.\n\nIf you are using the data as a layer in a published map, please include the\nfollowing attribution text: 'Source: EC JRC/Google'\n\n### Citations\n\nCitations:\n\n- Jean-Francois Pekel, Andrew Cottam, Noel Gorelick, Alan S. Belward,\n High-resolution mapping of global surface water and its long-term changes.\n Nature 540, 418-422 (2016). ([doi:10.1038/nature20584](https://doi.org/10.1038/nature20584))\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('JRC/GSW1_4/MonthlyRecurrence');\n\nvar visualization = {\n bands: ['monthly_recurrence'],\n min: 0.0,\n max: 100.0,\n palette: ['ffffff', 'ffbbbb', '0000ff']\n};\n\nMap.setCenter(-51.482, -0.835, 6);\n\nMap.addLayer(dataset, visualization, 'Monthly Recurrence');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/JRC/JRC_GSW1_4_MonthlyRecurrence) \n[JRC Monthly Water Recurrence, v1.4](/earth-engine/datasets/catalog/JRC_GSW1_4_MonthlyRecurrence) \nThis dataset contains maps of the location and temporal distribution of surface water from 1984 to 2021 and provides statistics on the extent and change of those water surfaces. For more information see the associated journal article: High-resolution mapping of global surface water and its long-term changes (Nature, 2016) and ... \nJRC/GSW1_4/MonthlyRecurrence, geophysical,google,history,jrc,landsat-derived,monthly,surface,surface-ground-water,water \n1984-03-16T00:00:00Z/2022-01-01T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://global-surface-water.appspot.com)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/JRC_GSW1_4_MonthlyRecurrence)"]]
