National Wetlands Inventory
Ecological Services

Wetlands Mapper

The Wetlands mapper is designed to deliver easy-to-use, map like views of America’s Wetland resources. It integrates digital map data along with other resource information to produce current information on the status, extent, characteristics and functions of wetlands, riparian, and deepwater habitats. The Wetland Mapper fulfills the U.S. Fish and Wildlife Service’s strategic plan for the development, revision and dissemination of wetlands data and information to resource managers and the public. This information is intended  to promote the understanding and conservation of wetland resources through discovery and education as well as to aid in resource management, research and decision making.

The wetlands displayed on the Wetlands Mapper show wetland type and extent using a biological definition of wetlands. There is no attempt to define the limits of proprietary jurisdiction of any Federal, State, or local government, or to establish the geographical scope of the regulatory programs of government agencies.

number 1 Read the DisclaimerData Limitations, Exclusions and Precautions, and the  Wetlands Geodatabase User Caution.
number 2

Refer to the following links for documentation and instructions:

number 3 Open any Mapper by clicking on the map icons below (best viewed by maximizing your browser window):

Wetland Mapper V2

NWI V2 data desktop/mobile viewer;
data last modified November 22, 2016.

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Projects Mapper V2

Recent wetland data additions
and active wetland mapping projects.

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Wetland Mapper V1

NWI V1 data desktop viewer;
data last modified May 25, 2016.

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Please note:

  • Adobe Flash™ is required to access the Wetlands Mapper V1. Please visit the Adobe Flash Player website to download the latest version of the player. Adobe Flash is a trademark from Adobe Systems Incorporated.
Last updated: March 20, 2017