[1] Bolton, D. K.，Gray, J. M. Melaas, E. K.，Moon, M.、Eklundh, L. 和 Friedl, M. A.: Continental-scale land surface phenology from harmonized
Landsat 8 and Sentinel-2 imagery, Remote Sens. Environ., 240, 111685,
https://doi.org/10.1016/j.rse.2020.111685, 2020 年。
[null,null,[],[[["\u003cp\u003eThe ESA WorldCereal Active Cropland dataset provides global, seasonal active cropland markers at 10m resolution for 2021.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset identifies areas actively cultivated during specific growing seasons, based on a full crop growth cycle.\u003c/p\u003e\n"],["\u003cp\u003eIt includes markers for winter cereals, spring cereals, main maize season, and a second maize season where applicable.\u003c/p\u003e\n"],["\u003cp\u003eEach image in the collection has a binary classification band (0 for inactive, 100 for active cropland) and can be filtered by agro-ecological zone (AEZ) and season.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset was generated as part of the ESA-WorldCereal project and is available under a CC-BY-4.0 license.\u003c/p\u003e\n"]]],[],null,["# ESA WorldCereal Active Cropland 10 m v100\n\nDataset Availability\n: 2020-01-01T00:00:00Z--2021-12-31T23:59:59Z\n\nDataset Provider\n:\n\n\n [ESA WorldCereal Consortium](https://esa-worldcereal.org/en)\n\nTags\n:\n[agriculture](/earth-engine/datasets/tags/agriculture) [copernicus](/earth-engine/datasets/tags/copernicus) [crop](/earth-engine/datasets/tags/crop) [esa](/earth-engine/datasets/tags/esa) [global](/earth-engine/datasets/tags/global) [landcover](/earth-engine/datasets/tags/landcover) [landsat](/earth-engine/datasets/tags/landsat) [sentinel1-derived](/earth-engine/datasets/tags/sentinel1-derived) [sentinel2-derived](/earth-engine/datasets/tags/sentinel2-derived) \n\n#### Description\n\nThe European Space Agency (ESA) WorldCereal Active Cropland 10 m 2021\nproduct suite contains global-scale seasonal active cropland markers. They\nwere generated as part of the\n[ESA-WorldCereal project](https://esa-worldcereal.org/). The active cropland\nproducts indicate whether or not a pixel identified as temporary crops has\nbeen actively cultivated during a specific growing season. In order for a\npixel to be labeled as \"active\" during a particular growing season, a full\ncrop growth cycle (sowing, growing, senescence and harvesting) needs to take\nplace within the designated time period. Note that this active marker is not\ncrop-type specific. Any crop grown (slightly) outside the predefined growing\nseasons will not be flagged as active cropland in any of the seasons covered\nby the WorldCereal system. The active marker results from running a growing\nseason detection algorithm \\[1\\] on the Sentinel-2 derived enhanced vegetation\nindex (EVI). More information on the methodology used to generate these\nproducts is described in \\[2\\].\n\nThis collection contains up to 106 agro-ecological zone (AEZ) images per\ncrop season, where each AEZ has its own seasonality. The seasons for which\nthe active cropland marker is available are described in the list below and\nwere developed in \\[3\\] as part of the project.\n\nWorldCereal seasons description:\n\n- tc-wintercereals: the main cereals season defined in an AEZ\n- tc-springcereals: optional springcereals season, only defined in certain AEZ\n- tc-maize-main: the main maize season defined in an AEZ\n- tc-maize-second: optional second maize season, only defined in certain AEZ\n\nEach product (image) has a binary classification band where value 0\ncorresponds to inactive cropland and value 100 corresponds to active\ncropland.\n\nThe collection should be filtered using one or more of the following image\nproperties:\n\n- aez_id, holding the ID of the AEZ to which the image belongs\n- season, describing the season for which the image is valid.\n\nReferences:\n\n- \\[1\\] Bolton, D. K., Gray, J. M., Melaas, E. K., Moon, M., Eklundh, L., and Friedl, M. A.: Continental-scale land surface phenology from harmonized Landsat 8 and Sentinel-2 imagery, Remote Sens. Environ., 240, 111685, https://doi.org/10.1016/j.rse.2020.111685, 2020.\n- \\[2\\] [WorldCereal methodology and products paper](https://doi.org/10.5194/essd-2023-184)\n- \\[3\\] [WorldCereal global seasonality paper](https://doi.org/10.1080/15481603.2022.2079273)\n\nWorldCereal datasets:\n\n- Version 100 for year 2021\n - [ESA/WorldCereal/AEZ/v100](/earth-engine/datasets/catalog/ESA_WorldCereal_AEZ_v100)\n - [ESA/WorldCereal/2021/MODELS/v100](/earth-engine/datasets/catalog/ESA_WorldCereal_2021_MODELS_v100)\n - [ESA/WorldCereal/2021/MARKERS/v100](/earth-engine/datasets/catalog/ESA_WorldCereal_2021_MARKERS_v100)\n\n### Bands\n\n\n**Pixel Size**\n\n10 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|------------------|-----|-----|------------|--------------------------|\n| `classification` | 0 | 100 | meters | Classification: 0 or 100 |\n\n### Image Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|---------|--------|--------------------------------------------------------------------|\n| aez_id | INT | ID of the agro-ecological zone (AEZ) to which the product belongs. |\n| product | STRING | WorldCereal product name. |\n| season | STRING | Season for which the product is valid. |\n\n### Terms of Use\n\n**Terms of Use**\n\n[CC-BY-4.0](https://spdx.org/licenses/CC-BY-4.0.html)\n\n### Citations\n\nCitations:\n\n- Van Tricht, K., Degerickx, J., Gilliams, S., Zanaga, D., Battude, M., Grosu,\n A., Brombacher, J., Lesiv, M., Bayas, J. C. L., Karanam, S., Fritz, S.,\n Becker-Reshef, I., Franch, B., Mollà-Bononad, B., Boogaard, H., Pratihast,\n A. K., and Szantoi, Z.: WorldCereal: a dynamic open-source system for\n global-scale, seasonal, and reproducible crop and irrigation mapping, Earth\n Syst. Sci. Data Discuss. \\[preprint\\],\n [doi:10.5194/essd-2023-184](https://doi.org/10.5194/essd-2023-184), in\n review, 2023.,\n\n### DOIs\n\n- \u003chttps://doi.org/10.5194/essd-2023-184\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 dataset = ee.ImageCollection('ESA/WorldCereal/2021/MARKERS/v100')\n\n// Filter on AEZ\nvar aez_46173 = dataset.filter('aez_id == 46173');\n\n// Get the active cropland marker for the different seasons\nvar activemarker_summerseason = aez_46173.filter('season == \"tc-maize-main\"');\nvar activemarker_winterseason = aez_46173.filter('season == \"tc-wintercereals\"');\n\n// Visualization specifics: red is inactive, green is active cropland\nvar visualization = {\n bands: ['classification'],\n max: 100,\n palette: ['eb0000', '37e622']\n};\n\n// Show active cropland in two major growing seasons in US.\nMap.addLayer(activemarker_summerseason, visualization, 'Active cropland tc-maize-main');\nMap.addLayer(activemarker_winterseason, visualization, 'Active cropland tc-wintercereals');\n\nMap.setCenter(-98.987, 38.0454, 11)\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/ESA/ESA_WorldCereal_2021_MARKERS_v100) \n[ESA WorldCereal Active Cropland 10 m v100](/earth-engine/datasets/catalog/ESA_WorldCereal_2021_MARKERS_v100) \nThe European Space Agency (ESA) WorldCereal Active Cropland 10 m 2021 product suite contains global-scale seasonal active cropland markers. They were generated as part of the ESA-WorldCereal project. The active cropland products indicate whether or not a pixel identified as temporary crops has been actively cultivated during a specific growing ... \nESA/WorldCereal/2021/MARKERS/v100, agriculture,copernicus,crop,esa,global,landcover,landsat,sentinel1-derived,sentinel2-derived \n2020-01-01T00:00:00Z/2021-12-31T23:59:59Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5194/essd-2023-184](https://doi.org/https://esa-worldcereal.org/en)\n- [https://doi.org/10.5194/essd-2023-184](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/ESA_WorldCereal_2021_MARKERS_v100)"]]
