There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, State, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, State, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities. NWI information is not intended to be used as a precise locator of wetland boundaries, for site specific planning or management, or for regulatory purposes. Attribute Accuracy Statistically valid attribute accuracy information is not available for these data. Anecdotal information through use by DNR staff suggests that attribute information for this data set becomes less reliable in the smallest delineations.
All polygons are closed and lines intersect where intended.
Completeness All features mapped by the U.S. Fish and Wildlife service are included in the data set, who are also the best source of documentation on mapping rules employed during the production of the data set. In general, point features are those that were considered significant during the interpretation process, but were too small in area to be maintained as polygons. Criteria for collapsing polygons into points probably varied during the course of the mapping effort. In forested areas, small open water and emergent wetlands are mapped and point features are less common than in prairie landscapes. In addition, some small wetlands plus those obscured by dense forest cover may not be included in this dataset.