The Association of State Wetland Managers in collaboration with Virginia Tech’s Conservation Management Institute (CMI) and the U.S. Fish and Wildlife Service’s Northeast Region created Wetlands One-Stop Mapping to provide easy online access to geospatial data on wetlands and soils produced by federal and state agencies.  The U.S. Fish and Wildlife Service (FWS), through its National Wetland Inventory (NWI), has produced wetland geospatial data for most of the country. While different agencies post data on their own sites, there is not a single place to go for these data. Wetlands One-Stop Mapping provides links to these and other websites. It provides online access to classification tools for adding hydrogeomorphic-type to wetland inventory data and the results of NWI+ projects (maps and reports). The geospatial information is linked to aerial imagery (and topographic maps) through ESRI’s ArcGIS (including ArcGIS Explorer) for easy viewing of wetlands, their characteristics, and functions for areas where NWI+ data are available.

The website also provides links to other federal and state websites that contain information on wetlands and geospatial wetland data.  Among the national datasets accessible via Wetlands One-Stop Mapping are the NWI’s wetlands mapper, USDA’s web soil survey, USGS’s national hydrography data and hydrologic units (HUCs).  Links are also provided to NatureServe Explorer and the U.S. National Vegetation Classification Hierarchy Explorer along with guidance on how to extract descriptions of wetland plant communities from those sites for specific areas of interest.

Wetlands One-Stop Mapping Links by Subject


National Wetlands Inventory (NWI)

Wetland Primer

Federal Standards & Funding for Wetland Mapping

National Data Sets & Information


NWI+ Data & Information

FWS Wetlands Mapper

LLWW Classification

NWI+ Data Layers

NWI+ Mapper

NWI+ Reports


State Wetland Mapping Summaries

State Wetland Program Websites & Data


Wetland Mapping Training

Reports and Publications

Reports & Publications

Other Mapping & Wetland Resources

Other Resources

Wetland Plant Community Information

Wetland Mapping Consortium

Wetland Classification Image Gallery