National Wetlands Inventory (NWI) polygon data, Arizona

Mar 9, 2011 (Last modified May 14, 2011)
Description:
This data set represents the extent, approximate location and type of wetlands and deepwater habitats in Arizona. 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. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery.

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. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps.


NOTE: Due to the variation in use and analysis of this data by the end user, each of states wetlands data extends beyond the state boundary. Each state includes wetlands data that intersect the 1:24,000 quadrangles that contain part of that state (1:2,000,000 source data). This allows the user to clip the data to their specific analysis datasets. Beware that two adjacent states will contain some of the same data along their borders.

Data Provided By:
U.S. Fish and Wildlife Service. 2009. CONUS_wet_poly. Washington, D.C: U.S. Fish and Wildlife Service, Division of Habitat and Resouce Conservation.
Content date:
1977, present
Citation:
U.S. Fish and Wildlife Service. 2009. CONUS_wet_poly. Washington, D.C: U.S. Fish and Wildlife Service, Division of Habitat and Resouce Conservation.  Online linkage: http://www.fws.gov/wetlands/
Contact Organization:
U.S. Fish and Wildlife Service
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Use Constraints:
None. Acknowledgement of the U.S. Fish and Wildlife Service and (or) the National Wetlands Inventory would be appreciated in products derived from these data
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