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.