{F49AA442-7D99-4E3A-BB26-A56A9F32F846} eng; USA utf8 dataset Randy Comeleo U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory (NHEERL) GIS Analyst (541) 754-4491 200 S.W. 35th Street Corvallis OR 97333 comeleo.randy@epa.gov https://www.epa.gov/aboutepa/about-national-health-and-environmental-effects-research-laboratory-nheerl pointOfContact 2024-12-06 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) complex 212 Level IV Ecoregions of Texas 2012-01-01 publication U.S. EPA Office of Research and Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL) Corvallis OR publisher US Environmental Protection Agency originator mapDigital Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of patterns of biotic and abiotic phenomena, including geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology. The relative importance of each characteristic varies from one ecological region to another. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 50 regions (Commission for Environmental Cooperation Working Group, 1997). At Level III, the continental United States contains 105 regions whereas the conterminous United States has 85 (U.S. Environmental Protection Agency, 2011). Level IV ecoregions are further subdivisions of Level III ecoregions. Methods used to define the ecoregions are explained in Omernik (1995, 2004), Omernik and others (2000), and Gallant and others (1989). Literature cited: Commission for Environmental Cooperation Working Group, 1997, Ecological regions of North America- toward a common perspective: Montreal, Commission for Environmental Cooperation, 71 p. Gallant, A. L., Whittier, T.R., Larsen, D.P., Omernik, J.M., and Hughes, R.M., 1989, Regionalization as a tool for managing environmental resources: Corvallis, Oregon, U.S. Environmental Protection Agency, EPA/600/3-89/060, 152p. Omernik, J.M., 1995, Ecoregions - a framework for environmental management, in Davis, W.S. and Simon, T.P., eds., Biological assessment and criteria-tools for water resource planning and decision making: Boca Raton, Florida, Lewis Publishers, p.49-62. Omernik, J.M., Chapman, S.S., Lillie, R.A., and Dumke, R.T., 2000, Ecoregions of Wisconsin: Transactions of the Wisconsin Academy of Science, Arts, and Letters, v. 88, p. 77-103. Omernik, J.M., 2004, Perspectives on the nature and definitions of ecological regions: Environmental Management, v. 34, Supplement 1, p. s27-s38. U.S. Environmental Protection Agency. 2011. Level III and IV ecoregions of the continental United States. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, Oregon, Map scale 1:3,000,000. Available online at: https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-states. Comments and questions regarding Ecoregions should be addressed to Glenn Griffith, USGS, c/o US EPA., 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4465, email:griffith.glenn@epa.gov Alternate: James Omernik, USGS, c/o US EPA, 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4458, email:omernik.james@epa.gov Ecoregion maps assist managers of aquatic and terrestrial resources to understand the regional patterns of the realistically attainable quality of these resources completed Randy Comeleo U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory (NHEERL) GIS Analyst (541) 754-4491 200 S.W. 35th Street Corvallis OR 97333 comeleo.randy@epa.gov https://www.epa.gov/aboutepa/about-national-health-and-environmental-effects-research-laboratory-nheerl pointOfContact asNeeded Ecosystem Environment Management Natural Resources Surface Water theme EPA GIS Keyword Thesaurus United States place None https://edg.epa.gov/EPA_Data_License.htm otherRestrictions Use Constraints: None otherRestrictions Access Constraints: None PUBLIC http://project-open-data.github.io/schema/#accessLevel Standard Technical Controls vector eng; USA boundaries environment location Native Dataset Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.3.3600 -107.249779 93.321324 25.37366 36.707033 2012-05-08 Electronic versions of ecoregion maps and posters as well as other ecoregion resources are available at: https://www.epa.gov/eco-research/ecoregions. Except for the Great Lakes, waterbodies were merged with surrounding ecoregion polygons, especially along coastlines. Ecoregions were digitized at 1:250,000 scale and are intended for large geographic extents (i.e. states, multiple counties, or river basins). Use for smaller areas, such as individual counties or a 1:24,000 scale map boundary, is not recommended. true Entity and Attribute Information Entity and Attribute Overview: Ecoregions are hierarchical, with Level IV being the most detailed and Level I defining the broadest classifications. Because of this hierarchy, Level IV features include appropriate codes and names for Levels III, II, and I. Likewise, Level III features contain Levels II and I, and Level II retains Level I information. Attributes pertaining to Level IV are only available for the Conterminous United States (US_). Level III has attributes for the US and North America (NA_) while Levels II and I apply to only North America. All features are identified by State and EPA Administrative Regions, as well. Fields ending with "KEY" combine ecoregion code and name attributes for convenient legends and are linked to style and layer files containing color definitions. Entity and Attribute Detail Citation: none Randy Comeleo U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory (NHEERL) GIS Analyst (541) 754-4491 200 S.W. 35th Street Corvallis OR 97333 comeleo.randy@epa.gov https://www.epa.gov/aboutepa/about-national-health-and-environmental-effects-research-laboratory-nheerl distributor https://dmap-prod-oms-edc.s3.us-east-1.amazonaws.com/ORD/Ecoregions/tx/tx_eco_l4.zip download Download The URL providing direct access to the downloadable dataset. download https://edg.epa.gov/metadata/ ESRI:ArcGIS API The endpoint of a web service to access the dataset (REST endpoint, WMS GetCapabilities URL, or a SOAP WSDL endpoint). webMapService dataset Horizontal Positional Accuracy Report Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at https://www.epa.gov/geospatial/epa-national-geospatial-data-policy Unknown Unknown Although ecoregion polygons and attributes have been checked for accuracy, some errors may remain. Polygons along state borders were reviewed and updated, May 2010. ARC/INFO software is used to create and maintain topological relationships. This lineage was generated by the FGDC CSDGM to 19139 transformation 1) U.S.G.S. 1:250,000 topographic maps are used to delineate the ecoregions. The lines drawn are manually digitized or scanned to produce georeferenced electronic files. 2011-01-01T00:00:00 2) All base maps are joined together and errors along the edges are resolved. 2011-01-01T00:00:00 3) Topology is established and the maps are reviewed for accuracy, completeness, and conformity with the original lines. Corrections are made as needed and topology regenerated. 2011-01-01T00:00:00 4) Attributes are added. 2011-01-01T00:00:00 5) Maps are plotted for visual inspection by two individuals and necessary changes made. 2011-01-01T00:00:00 6) Ecoregions from all available states are merged and dissolved to identify and correct inconsistencies. 2011-01-01T00:00:00 7) Polygons of the corrected seamless ecoregion features are extended beyond the coastal borders. 2011-01-01T00:00:00 8) State and Ecoregion datasets are intersected. 2011-01-01T00:00:00 9) Topology errors removed. 2011-01-01T00:00:00 10) Final QA 2011-01-01T00:00:00 11) Select State from national geodatabase 2011-01-01T00:00:00 12) metadata 2012-01-01T00:00:00 unknown 2020-10-13 This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2024-02-09T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Randy Comeleo U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory (NHEERL) GIS Analyst (541) 754-4491 200 S.W. 35th Street Corvallis OR 97333 comeleo.randy@epa.gov https://www.epa.gov/aboutepa/about-national-health-and-environmental-effects-research-laboratory-nheerl pointOfContact