National Wetlands Inventory

National Spatial Data Infrastructure (NSDI) Wetlands Layer:

Visit the Wetlands Layer index page for more information.

Contact Information:

You can also email the FWS Customer Service Center, or call 1.800.344.WILD (1.800.344.9453).

Wetlands Inventory Data

Fact Sheets

Digital Data

  • Wetlands Mapper
    • View wetlands information using a map interface.
    • Print a snapshot or download map data.
    • Wetlands Mapper documentation and answers to frequently asked questions.

  • Download Wetlands Digital Data
    • Download current seamless wetlands data as viewed on the Wetlands Mapper.
    • Two file download options per State: Geodatabase or Shapefiles
    • Viewing instructions.

  • Web Map Services (WMS)
    • Geospatial Wetlands Digital Data is also available through an Open GIS Consortium (OGC) Web Map Service.

  • View Wetlands Data with Google Earth
    • Keyhole Markup Language file has been created to view Wetlands Data with Google Earth.
    • Google Earth maps the surface of the Earth by superimposing images from satellites and aerial photography.
  • Map Creation
    • Tips and Technical Information
    • About the Wetlands Maps
  • Product Summary
  • Metadata
    • Metadata or "data about data" describes the content, quality, condition, and other characteristics of data.
  • Wetland Resource Attribution and Verification Tools and Forms
  • Digital data available on this site represent the latest, most accurate information available from the U.S. Fish and Wildlife Service. This wetlands data layer is a National Geospatial Data Asset (NGDA) dataset designated by OMB Circular A-16 and the Federal Geographic Data Committee (FGDC) and is registered through and

New! Contribute your Data to the Wetlands Master Geodatabase

Federal Data Standards for Wetlands

  • The U.S. Fish and Wildlife Service (USFWS) uses data standards to increase the quality and compatibility of its data. This approach increases the opportunity to share data and reduce incidents of redundant data development.

Wetland Codes

  • A series of letter and number codes has been developed to adapt the national wetland classification system to map form. These alpha-numeric codes correspond to the classification nomenclature that best describes the habitat. Click here to visit the Wetlands Code web page.

National Spatial Data Infrastructure (NSDI) Wetlands Layer

  • The National Spatial Data Infrastructure (NSDI) is a way of enhancing the accessibility, communication, and use of geospatial data to support a wide variety of decisions at all levels of society. NSDI is defined as the technologies, policies,and people necessary to promote sharing of geospatial data throughout all levels of government, the private and non-profit sectors, and the academic community. Learn more ...

Data Quality

Other Information


















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Wetlands Mapper
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Download Data
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Web Map Services
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View Data w/Google Earth
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Map Creation
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