Mapping Narrow Linear Habitats as Line Features

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Mapping Narrow Linear Habitats as Line Features

The purpose of this document is to outline requirements for submitting features that lie beyond the FGDC Wetland Mapping Standard that will no longer be accepted as polygons within projects initiated (i.e., contracts signed) after September 30, 2022. These features, also known as Narrow linear habitats (NLH) are non-vegetated Cowardin-defined features (Federal Geographic Data Committee, 2013) that are less than 15 feet (4.5 meters) wide in the United States and territories outside of Alaska. If project goals require the inclusion of NLH features beyond the Wetland Mapping Standard, these features can be submitted to the National Wetlands Inventory (NWI) in a separate linear data layer. The submission of a linear data layer is NOT required by the NWI to meet the Wetland Mapping Standard.

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Large pool of water surrounded by low tundra grasses under cloud covered sky.
The U.S. Fish and Wildlife Service is the principal federal agency tasked with providing information to the public on the extent and status of the nation’s wetland and deepwater habitats, as well as changes to these habitats over time.