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    • Geographically Isolated Wetlands (Non-Floodplain Wetlands) of the Conterminous United States

    Metadata Updated: February 25, 2025

    This data set represents the extent and approximate ___location of GIWs, also known as non-floodplain wetlands (NFWs), in the conterminous United States. NWI lacustrine systems and palustrine wetlands were determined to be “isolated” based on their geographic ___location (i.e., unconnected, based on a distance measure, to specific classes of NHD aquatic systems). GIWs were here considered geographically isolated when they were outside of 10 meters from select NHD lines and polygons or were not adjacent to NWI Riverine or Estuarine wetlands and (where applicable) outside of 10 meters from a coastline (e.g., oceans or Great Lakes).

    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 December 6, 2024
    Metadata Created Date February 25, 2025
    Metadata Updated Date February 25, 2025
    Reference Date(s) January 29, 2016 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date December 6, 2024
    Metadata Created Date February 25, 2025
    Metadata Updated Date February 25, 2025
    Reference Date(s) January 29, 2016 (publication)
    Responsible Party U.S. EPA Office of Research and Development (Publisher)
    Contact Email
    Guid 39C6C6B6-EECD-40DE-9EA6-5FDE48A95C27
    Access Constraints
    Bbox East Long -65.348195
    Bbox North Lat 51.601241
    Bbox South Lat 22.985016
    Bbox West Long -127.853934
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 5af03444-4e4f-4cca-83f6-00248f863e3f
    Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
    Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
    Licence There are no access and use limitations for this item. 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.
    Lineage Methodology for producing non-floodplain wetlands
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-127.853934, 22.985016], [-65.348195, 22.985016], [-65.348195, 51.601241], [-127.853934, 51.601241], [-127.853934, 22.985016]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System 0
    Spatial Harvester True
    Temporal Extent Begin 2013-01-01T00:00:00
    Temporal Extent End 2015-12-31

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