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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.<\/SPAN><\/P>

These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979).<\/SPAN><\/P>

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.<\/SPAN><\/P>

These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters.<\/SPAN><\/P>

Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory.<\/SPAN><\/P>

These habitats, because of their depth, go undetected by aerial imagery.<\/SPAN><\/P>

By policy, the Service also excludes certain types of \"farmed wetlands\" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition.<\/SPAN><\/P>

Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps.<\/SPAN><\/P>

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