La base de données nationale sur l'occupation des sols (NLCD) est une base de données sur l'occupation des sols basée sur Landsat, avec une résolution de 30 m et couvrant huit époques (2001, 2004, 2006, 2008, 2011, 2013, 2016 et 2019). Une neuvième époque pour 2021 est également disponible ici. Les images s'appuient sur la couche de données d'imperméabilité pour les zones urbaines.
L'Institut d'études géologiques des États-Unis (USGS), en partenariat avec plusieurs agences fédérales, a développé et publié sept produits de la base de données nationale sur l'occupation des sols (NLCD, National Land Cover Database) : NLCD 1992, 2001, 2006, 2011, 2016, 2019 et 2021. À partir de la version 2016, les produits de couverture du sol ont été créés à des intervalles de deux à trois ans.
[null,null,[],[[["\u003cp\u003eThe National Land Cover Database (NLCD) provides 30-meter resolution land cover data across the United States, derived from Landsat imagery.\u003c/p\u003e\n"],["\u003cp\u003eNLCD offers data for multiple epochs, including 2001, 2004, 2006, 2008, 2011, 2013, 2016, 2019, and 2021, allowing for change detection and analysis over time.\u003c/p\u003e\n"],["\u003cp\u003eThe USGS, in collaboration with federal agencies, develops and releases the NLCD products, with recent releases focusing on shorter, two-to-three-year intervals for more frequent land cover assessments.\u003c/p\u003e\n"]]],["The USGS National Land Cover Database (NLCD) provides 30-meter land cover data from Landsat imagery. It includes nine epochs: 2001, 2004, 2006, 2008, 2011, 2013, 2016, 2019, and 2021. NLCD products have been released for seven datasets : 1992, 2001, 2006, 2011, 2016, 2019 and 2021. The 2016 release started using two-to-three-year intervals. The data, which relies on imperviousness layers for urban areas, are created in partnership with federal agencies.\n"],null,["# Datasets tagged mrlc in Earth Engine\n\n-\n\n |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | [### NLCD 2019: USGS National Land Cover Database, 2019 release](/earth-engine/datasets/catalog/USGS_NLCD_RELEASES_2019_REL_NLCD) |\n | NLCD (the National Land Cover Database) is a 30-m Landsat-based land cover database spanning 8 epochs (2001, 2004, 2006, 2008, 2011, 2013, 2016, and 2019). A ninth epoch for 2021 is also available here. The images rely on the imperviousness data layer for the urban ... |\n | [blm](/earth-engine/datasets/tags/blm) [landcover](/earth-engine/datasets/tags/landcover) [landuse-landcover](/earth-engine/datasets/tags/landuse-landcover) [mrlc](/earth-engine/datasets/tags/mrlc) [nlcd](/earth-engine/datasets/tags/nlcd) [usgs](/earth-engine/datasets/tags/usgs) |\n\n-\n\n |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n | [### NLCD 2021: USGS National Land Cover Database, 2021 release](/earth-engine/datasets/catalog/USGS_NLCD_RELEASES_2021_REL_NLCD) |\n | The U.S. Geological Survey (USGS), in partnership with several federal agencies, has now developed and released seven National Land Cover Database (NLCD) products: NLCD 1992, 2001, 2006, 2011, 2016, 2019, and 2021. Beginning with the 2016 release, land cover products were created for two-to-three-year intervals ... |\n | [blm](/earth-engine/datasets/tags/blm) [landcover](/earth-engine/datasets/tags/landcover) [landuse-landcover](/earth-engine/datasets/tags/landuse-landcover) [mrlc](/earth-engine/datasets/tags/mrlc) [nlcd](/earth-engine/datasets/tags/nlcd) [usgs](/earth-engine/datasets/tags/usgs) |"]]
