National Wetlands Inventory (NWI) - Wetlands

Jan 14, 2015 (Last modified Apr 4, 2017)
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This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. Digital wetlands data are intended for use with base maps and digital aerial photography at a scale of 1:12,000 or smaller. Due to the scale, the primary intended use is for regional and watershed data display and analysis, rather than specific project data analysis. The map products were neither designed nor intended to represent legal or regulatory products. Questions or comments regarding the interpretation or classification of wetlands or deepwater habitats can be addressed by visiting Due to the quantity and complexity of the wetlands data the wetlands only display at 1:250,000 scale and greater. For wetland information visit
Data Provided By:
U.S. Fish and Wildlife Service, National Standards and Support Team,
Map Service URL:
Content date:
not specified
National Wetlands Inventory 2.0, U.S. Fish and Wildlife Service, 2016
Contact Organization:
U.S. Fish and Wildlife Service, National Standards and Support Team,
Contact Person(s):
not specified
Use Constraints:
No warranty expressed or implied is made regarding the accuracy or utility of the data and information on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data, and information, and aggregate use with other data and information. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data and information. The USFWS shall not be held liable for improper or incorrect use of the data and information described and/or contained herein.
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FGDC Standard Metadata XML
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Dataset Type:
External Map Service (ArcGIS)
Bookmarked by 3 Members , 3 Groups
Included in 4 Public Maps , 2 Private Maps
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