[null,null,[],[[["\u003cp\u003eThe EPA Ecoregions dataset provides a spatial framework for ecosystem research, assessment, and management across the United States.\u003c/p\u003e\n"],["\u003cp\u003eEcoregions are classified into hierarchical levels (I-IV), with Level IV being the most detailed, based on biotic and abiotic factors like geology, vegetation, and climate.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset covers the conterminous United States (excluding Alaska and Hawaii) and includes both USEPA and CEC classification schemes.\u003c/p\u003e\n"],["\u003cp\u003eThe data is publicly available with no restrictions on use.\u003c/p\u003e\n"],["\u003cp\u003eEarth Engine provides tools to explore and visualize the EPA Ecoregions dataset, offering insights into ecosystem distributions and characteristics.\u003c/p\u003e\n"]]],["The EPA Ecoregions dataset, available from April 16-17, 2013, offers a spatial framework for ecosystem research, management, and monitoring. It classifies the conterminous U.S. into ecoregions based on biotic and abiotic factors, with Level IV being the most detailed. The data, also based on Commission for Environmental Cooperation (CEC) classifications, is structured hierarchically and includes codes and names for various levels. It provides data for the conterminous United States, excluding Alaska and Hawaii. Users can access the dataset and visualize it via Google Earth Engine.\n"],null,["# US EPA Ecoregions (Level IV)\n\nDataset Availability\n: 2013-04-16T00:00:00Z--2013-04-17T00:00:00Z\n\nDataset Provider\n:\n\n\n [United States Environmental Protection Agency](https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-states)\n\nTags\n:\n[ecoregions](/earth-engine/datasets/tags/ecoregions) [ecosystems](/earth-engine/datasets/tags/ecosystems) [epa](/earth-engine/datasets/tags/epa) [table](/earth-engine/datasets/tags/table) \n\n#### Description\n\nThe U.S. Environmental Protection Agency (USEPA) provides\nthe Ecoregions dataset to serve as a spatial framework for the\nresearch, assessment, management, and monitoring of ecosystems\nand ecosystem components. Ecoregions denote areas of general\nsimilarity in ecosystems and in the type, quality, and quantity\nof environmental resources. These general-purpose regions are\ncritical for structuring and implementing ecosystem management\nstrategies across federal agencies, state agencies, and nongovernmental\norganizations that are responsible for different types of resources\nwithin the same geographical areas.\n\nThe approach used to\ncompile this map is based on the premise that ecological regions\ncan be identified through the analysis of patterns of biotic\nand abiotic phenomena, including geology, physiography, vegetation,\nclimate, soils, land use, wildlife, and hydrology. The relative\nimportance of each characteristic varies from one ecological\nregion to another.\n\nThis dataset includes the USEPA ecoregions\nclassification scheme, as well as the scheme from the Commission\nfor Environmental Cooperation (CEC). Ecoregions are hierarchical,\nwith Level IV being the most detailed and Level I defining the\nbroadest classifications. Because of this hierarchy, Level III\nfeatures retain information from Levels I and II. The CEC divided\nall of North America in distinct ecoregions for Levels I, II,\nand III, while the USEPA did so only for the United States at\nLevel III and Level IV. The columns starting with 'us*' belong\nto the USEPA scheme, and the columns starting with 'na*' belong\nto the CEC scheme. The ingested version of this dataset contains\nfeatures for the conterminous United States only (that is, Alaska\nand Hawaii are not included). Methods used to define the ecoregions\nare explained in Omernik (1995, 2004), Omernik and others (2000),\nand Gallant and others (1989).\n\n\\*Calculated by the data provider.\n\n### Table Schema\n\n**Table Schema**\n\n| Name | Type | Description |\n|------------|--------|----------------------------------------------------------------------|\n| l1_key | STRING | NA Level I Code and Name |\n| l2_key | STRING | NA Level II Code and Name |\n| l3_key | STRING | US Level III Code and Name |\n| na_l1code | STRING | Code for Level I Ecoregion (North America/CEC) |\n| na_l1name | STRING | Name for Level I Ecoregion (North America/CEC) |\n| na_l2code | STRING | Code for Level II Ecoregion (North America/CEC) |\n| na_l2name | STRING | Name for Level II Ecoregion (North America/CEC) |\n| na_l3code | STRING | Code for Level III Ecoregion (North America/CEC) |\n| na_l3name | STRING | Name for Level III Ecoregion (North America/CEC) |\n| shape_area | DOUBLE | Area of the feature's geometry in its original format |\n| shape_leng | DOUBLE | Length of the edges in the feature's geometry in its original format |\n| us_l3code | STRING | Code for Level III Ecoregion (US/USEPA) |\n| us_l3name | STRING | Name for Level III Ecoregion (US/USEPA) |\n| l4_key | STRING | US Level IV Code and Name |\n| us_l4code | STRING | Code for Level IV Ecoregion (US/USEPA) |\n| us_l4name | STRING | Name for Level IV Ecoregion (US/USEPA) |\n\n### Terms of Use\n\n**Terms of Use**\n\nThere are no restrictions on use of this US public domain data.\n\n### Citations\n\nCitations:\n\n- Commission for Environmental Cooperation. 1997. Ecological regions\n of North America: toward a common perspective. Commission for Environmental\n Cooperation, Montreal, Quebec, Canada. 71p. Map (scale 1:12,500,000).\n Revised 2006.\n- McMahon, G., S.M. Gregonis, S.W. Waltman, J.M. Omernik, T.D. Thorson,\n J.A. Freeouf, A.H. Rorick, and J.E. Keys. 2001. Developing a spatial\n framework of common ecological regions for the conterminous United\n States. Environmental Management 28(3):293-316.\n- Omernik, J.M. 1987. Ecoregions of the conterminous United States.\n Map (scale 1:7,500,000). Annals of the Association of American\n Geographers 77(1):118-125.\n- Omernik, J.M. 1995. Ecoregions: A spatial framework for environmental\n management. In: Biological Assessment and Criteria: Tools for Water\n Resource Planning and Decision Making. Davis, W.S. and T.P. Simon\n (eds.), Lewis Publishers, Boca Raton, FL. p. 49-62.\n- Omernik, J.M. 2004. Perspectives on the nature and definition of\n ecological regions. Environmental Management 34(Supplement 1):S27-S38.\n- Omernik, J.M. and G.E. Griffith. 2014. Ecoregions of the conterminous\n United States: evolution of a hierarchical spatial framework. Environmental\n Management 54(6):1249-1266.\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.FeatureCollection('EPA/Ecoregions/2013/L4');\nvar visParams = {\n palette: ['0a3b04', '1a9924', '15d812'],\n min: 0.0,\n max: 67800000000.0,\n opacity: 0.8,\n};\nvar image = ee.Image().float().paint(dataset, 'shape_area');\nMap.setCenter(-99.814, 40.166, 5);\nMap.addLayer(image, visParams, 'EPA/Ecoregions/2013/L4');\nMap.addLayer(dataset, null, 'for Inspector', false);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/EPA/EPA_Ecoregions_2013_L4)\n\n### Visualize as a FeatureView\n\n\nA `FeatureView` is a view-only, accelerated representation of a\n`FeatureCollection`. For more details, visit the\n[`FeatureView` documentation.](/earth-engine/guides/featureview_overview)\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 fvLayer = ui.Map.FeatureViewLayer('EPA/Ecoregions/2013/L4_FeatureView');\n\nvar visParams = {\n color: {\n property: 'shape_area',\n mode: 'linear',\n palette: ['0a3b04', '1a9924', '15d812'],\n min: 0.0,\n max: 67800000000.0\n },\n opacity: 0.8,\n polygonStrokeOpacity: 0\n};\n\nfvLayer.setVisParams(visParams);\nfvLayer.setName('EPA/Ecoregions/2013/L4');\n\nMap.setCenter(-99.814, 40.166, 5);\nMap.add(fvLayer);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/EPA/EPA_Ecoregions_2013_L4_FeatureView) \n[US EPA Ecoregions (Level IV)](/earth-engine/datasets/catalog/EPA_Ecoregions_2013_L4) \nThe U.S. Environmental Protection Agency (USEPA) provides the Ecoregions dataset to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. These general-purpose regions are ... \nEPA/Ecoregions/2013/L4, ecoregions,ecosystems,epa,table \n2013-04-16T00:00:00Z/2013-04-17T00:00:00Z \n24.5 -124.8 49.4 -66.9 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-states)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/EPA_Ecoregions_2013_L4)"]]
