Wetlands/Land Use Data Layer
These data are developed through joint funding agreements with the U.S. Fish and Wildlife Service, National Wetlands Inventory (NWI). They are delineated from 1:40,000-scale NAPP color infrared photography and correspond to the USFWS Cowardin classification system for wetlands and deepwater habitats of the United States. The wetlands habitats are mapped to a one acre minimum map unit but smaller units often are identified. The upland categories are delineated using the Anderson, Level II system developed by the U.S. Geological Survey with a ten acre minimum resolution.
Wetlands & Land Use Attributing & Enhancements
- Import spatial and attribute data into ARC/INFO.
- Georeference to statewide TIC grid.
- Clean and build as double precision coverages.
- Join attributes to spatial data using polygon codes and corresponding Cowardin classification codes.
- Attach general Anderson level I identifiers and Land Use attributes for wetland and upland categories.
- Edgematch spatial data & attributes.
- First quality review & correct problems.
- Second quality review by management staff.
- Edit/correct problems.
- Third quality review by Data Base Administrator.
- Quad added to SCDNR GIS Database.
We have developed an NWI Classification Decoder that permits a user to type in a valid classification and receive the code translation. A valid code is case sensitive.
Download Available NWI Data
Data is available for download at no cost from DNR's GIS DNR Clearinghouse.