National Wetlands Inventory (NWI), DOI/USFWS
Entry ID: NWI

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Abstract: The Intergovernmental Panel on Climate Change (IPCC 2008) identified wetlands as the most vulnerable landscape feature affected by climate change.

The National Wetlands Inventory (NWI), established in 1975 by the U.S. Fish and Wildlife Service (USFWS), provides wetlands data in map and digital form for the United States.

The NWI database contains map and summary information about the status ... View entire text
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Description: Wetlands inventory data for downloading
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Geographic Coverage
Spatial coordinates   
  N: 75.0   S: -15.0   E: -60.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: U.S. Fish and Wildlife Service
Dataset Title: National Wetlands Inventory
Dataset Release Place: Madison, WI
Dataset Publisher: U.S. Fish and Wildlife Service, Department of the Interior
Online Resource:
Temporal Coverage
Start Date: 1990-01-01
Quality The Service's objective of mapping wetlands and deepwater habitats is to produce reconnaissance level information on the location, type and size of these resources. The maps are prepared from the analysis of high altitude imagery. Wetlands are identified based on vegetation, visible hydrology and geography. A margin of error is inherent in the use of imagery; thus, detailed on-the-ground ... View entire text
Access Constraints NONE
Use Constraints The updated Wetlands Mapper is designed to provide reliable geographical information and direct users to other potential sources of information. It is NOT intended to provide legal or regulatory products. Unintended use of the information or products is discouraged. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate federal, state or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities.
Data Set Progress
Originating Center
Data Center
National Wetlands Inventory, U.S. Fish and Wildlife Service, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 608 783 8425
Email: tom_dahl at
Contact Address:
National Wetlands Inventory
U.S. Fish and Wildlife Service
505 Science Drive
City: Madison
Province or State: WI
Postal Code: 53711-1060
Country: USA
Distribution Media: on-line, ftp, or WMS
Distribution Size: varies by location
Distribution Format: shapefiles, kml, WMS
Fees: none
Phone: (612) 713-5332
Email: brian_huberty at
Contact Address:
1 Federal Drive; MS 4056
City: Ft Snelling
Province or State: MN
Postal Code: 55111
Country: USA
Cowardin, et al. 1979. "Classification of wetlands and deepwater habitats of the United States", USFWS (FWS/OBS-79/31).

Dahl, T.E. 1990. "Wetlands losses in the United States mid 1780s to mid 1980s", U.S. Dept. of Interior, Fish and Wildlife Service, Washington, D.C.

Dahl, T.E. and C.E. Johnson. 1991. "Status and trends of wetlands in the Conterminous United States, mid 1979s to mid 1980s", U.S. ... View entire text
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2006-11-20
Last DIF Revision Date: 2014-04-03
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