Michigan Dept. of Environment, Great Lakes, and EnergyThe NWI 2005 was an update to the original 1978 NWI Layer produced by US Fish and Wildlife Service, and utilized 1998 and 2005 imagery to map wetland loss/change over time. Classification of wetlands is based on the Cowardin Wetland Classification system with a minimum mapping unit of 1/10 acre. Wetland data produced by interpreting aerial imagery and digitizing boundaries in a heads up GIS environment. The most current up to date statewide wetland inventory for Michigan available as of 2020. NWI 2015 update is currently in progress in a partnership between EGLE and Ducks Unlimited, with expected statewide completion in the near future. Field Name Descriptions NWICode The wetland classification codes are a series of letter and number codes that have been developed to adapt the national wetland classification system to map form. These alpha-numeric codes correspond to the classification nomenclature that best describes a particular wetland habitat. For example, PFO1A = Palustrine (P), Forested (FO), Broad-leaved Deciduous (1), Temporarily Flooded (A). Acres Size of the wetland. WETLAND_TYPE Written description of the wetland type. For questions about this content reach out to Jeremy Jones at jonesj28@michigan.gov . or Chad Fizzell fizzellc@michigan.gov or you can visit www.michigan.gov/wetlandsArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/d6e1bb68c5964731b38d3a7a4a687086_9engState of Michigan Open Data PortalPublicNational Wetland Inventory (NWI) 2005 [Michigan]Web servicesMichigan2005