This data set was collected from various digital map inventories maintained by SEWRPC. The source data sets include 2005 orthophotography, 2005 Wisconsin Wetland Inventory for Southeasern Wisconsin (Regional Wetland Inventory), 2005 Environmental Corridor Inventory, and 2005 Natural Areas Inventory. All wetland features--except filled wetlands ("$" prefix for wetland code), deep water lakes ("DWL" code), and uplands ("U" code)--were extracted from the 2005 Regional Wetland Inventory to create the set of wetland polygons from which ADID wetlands were identified. These areas were intersected with primary environmental corridor polygons--excluding water features--obtained from the 2005 Environmental Corridor Inventory to identify the ADID wetland polygons. The areas were also intersected with natural area features from the 2005 Natural Areas Inventory to identify ADID natural area wetland polygons . Finally, deep water features within the primary corridors and natural areas were selected to identify ADID lakes and ponds.
Each geodatabase file contains the following five feature classes:
1) ADID_Wetlands_2005: This layer is composed of all areas located within the 'Wetlands_2005' layer described below and located within the 'PrimaryEnvCorr_2005' layer also described below -- basically the intersection of 2005 wetlands and primary environmental corridors;
2) ADID_NaturalAreaWetlands_2005: These features are areas located within the 'Wetlands_2005' layer that are not located within the 'PrimaryEnvCorr_2005' layer but are located within natural areas from the SEWRPC 2005 Natural Areas Inventory -- additional wetlands outside of the primary corridors but within natural areas and that are to be protected;
3) ADID_Lakes_Ponds_2005: This layer contains those portions of water features from the SEWRPC 2005 Environmental Corridor Inventory that are located within 2005 Primary Environmental Corridors but are not located within the wetland features shown in the 'ADID_Wetlands_2005' layer and any water features that are located within Natural Areas identified in the SEWRPC 2005 Natural Areas Inventory but are not located within the wetland features shown in the 'ADID_Wetlands_2005' layer -- generally all deep water features within primary corridors and natural areas that are to be protected;
4) Wetlands_2005: A layer composed of nearly all polygons from the SEWRPC 2005 Regional Wetland Inventory, with the exception of filled wetlands ("$" prefix for wetland code), deep water lakes ("DWL" code), and uplands ("U" code) -- this is the set of wetland polygons from which ADID wetlands were identified;
5) PrimaryEnvCorr_2005: This layer consists of the Primary Environmental Corridor polygon set, excluding all water polygons, extracted from the SEWRPC 2005 Environmental Corridor Inventory.
All geodatabase files and feature classes contain a prefix identifying the county (Keno = Kenosha, Milw = Milwaukee, Ozau = Ozaukee, Raci = Racine, Walw = Walworth, Wash = Washington, Wauk = Waukesha) or, for the seven-county file, the prefix identifies the Region. The shapefiles are similarly organized into five sets of files named according to the layer names described above and are named with prefixes identifying the County or Region. The digital map files consist of polygon features only and do not contain additional attributes.
Complete metadata describing the SEWRPC 2005 Regional Wetland Inventory, SEWRPC 2005 Natural Areas Inventory, and SEWRPC 2005 Environmental Corridor Inventory is available from the Southeastern Wisconsin Regional Planning Commission, GIS Division.