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ROE Ecoregions Data

Metadata Updated: March 22, 2024

This web service layer group contains multiple layers at various scale dependencies which enhances the cartographic display of ecoregion data. Each layer depicts ecoregion features drawn at specific scales as detailed in the layer name. IMPORTANT information regarding proper legend rendering in ArcMap: Due to the limitations of Graphical Device Interface (GDI) resources per application on Windows, ArcMap does not display the legend in the Table of Contents for the ArcGIS Server service layer if the legend has more than 100 items. As of December 2011, there are 968 unique legend items in the Level IV Ecoregion Polygon legend. Follow this link (https://support.esri.com/en/knowledgebase/techarticles/detail/33741) for instructions about how to increase the maximum number of ArcGIS Server service layer legend items allowed for display in ArcMap. Note the instructions at this link provide a slightly incorrect path to "Maximum Legend Count". The correct path is HKEY_CURRENT_USER > Software > ESRI > ArcMap > Server > MapServerLayer > Maximum Legend Count. When editing the "Maximum Legend Count", update the field, "Value data" to 1000. To download a PDF version of the Level IV ecoregion map and legend, go to ftp://ftp.epa.gov/wed/ecoregions/us/Eco_Level_IV_US_pg.pdf. Please read the remainder of this layer description for general information about Level IV Omernik Ecoregions. This layer represents Level IV Omernik Ecoregions. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. Compilation of the level IV maps, performed at 1:250,000 scale, has been a part of collaborative projects between US Environmental Protection Agency, National Health and Environmental Effects Laboratory (NHEERL)--Corvallis, OR, the US Forest Service, Natural Resources Conservation Service, and a variety of other state and federal resource agencies. The ecoregions and subregions are designed to serve as a spatial framework for environmental resource management. The most immediate needs by the states are for developing regional biological criteria and water resource standards, and for setting management goals for nonpoint-source pollution. Level IV ecoregions 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. Explanation of the methods used to delineate the ecoregions are given in Omernik (1995), Griffith et al. (1994), and Gallant et al. (1989). For more information about Omernik ecoregions or to download ecoregion maps and GIS data, go to: https://www.epa.gov/wed/pages/ecoregions.htm.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date January 14, 2013
Metadata Created Date March 22, 2024
Metadata Updated Date March 22, 2024
Reference Date(s) January 14, 2013 (publication)
Frequency Of Update unknown

Metadata Source

Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

Additional Metadata

Resource Type Dataset
Metadata Date January 14, 2013
Metadata Created Date March 22, 2024
Metadata Updated Date March 22, 2024
Reference Date(s) January 14, 2013 (publication)
Responsible Party U.S. Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment (Point of Contact)
Contact Email
Guid {CFF66255-659B-4ABB-AD29-0B4C335CC2EA}
Access Constraints Use Constraints: None. Please check sources, scale, accuracy, currentness, and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of EPA would be appreciated., Access Constraints: None.
Bbox East Long -55.478846
Bbox North Lat 53.006908
Bbox South Lat 19.913981
Bbox West Long -135.923076
Coupled Resource
Frequency Of Update unknown
Harvest Object Id 1bbe0388-3752-46ed-a1a4-17f5825ada48
Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
Licence https://edg.epa.gov/EPA_Data_License.html
Licence Url https://edg.epa.gov/EPA_Data_License.html
Lineage This lineage was generated by the FGDC CSDGM to 19139 transformation
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-135.923076, 19.913981], [-55.478846, 19.913981], [-55.478846, 53.006908], [-135.923076, 53.006908], [-135.923076, 19.913981]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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