Download Seamless Wetlands Data

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Data can be downloaded by HUC 8 Watershed Boundary or by State.  The data is downloaded as a .zip file that contains the following layers:

  • Wetlands polygon data
  • Wetlands Project Metadata (includes image dates and project information)
  • Wetlands Historic Map Information*
  • Riparian polygon data*
  • Riparian Project Metadata (includes image dates and project information)*
  • Historic Wetlands*
  • Historic Wetlands Project Metadata (includes image dates and project information)*
  • Watershed Boundary Dataset (WBD) HUC8 modified** 

    * If available at the requested location.
    ** Not included in State downloads.

Information about each of these layers can be found on our Metadata page.     

Wetlands data viewed on the Wetlands Mapper can be downloaded by HUC8 watershed or by State or U.S. Territory in either file Geodatabase or Shapefile (PDF) format. The Wetlands Mapper 'Get Data' button allows data to be downloaded by HUC8 watershed or by State. The State Downloads page allows data to be downloaded by state.

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You can view the Geodatabase and Shapefiles by using ESRI's ArcGIS Explorer free software, among others. Please note that ArcGIS version 10.* is required for Geodatabase downloads.

State and watershed data downloaded will be in an equal area Albers projection with a North American Datum (NAD) of 1983.

*AutoCAD* users: In order to view NWI data you must first add the Albers projection information into your AutoCAD library. Do this by using the MAPSCSCREATE command and click ‘c’ for coordinate system. Then input the Albers specific projection information.

- Last updated: January 31, 2018 -