The IWI was not intended to delineate regulated wetlands, a determination that should be made on-site. The IWI data are available for purchase as hardcopy maps or in digital form. Hardcopy maps are available by 7.5-minute quadrangle and consist of wetland and deepwater features drawn on topographic base maps. The maps are useful for small-scale projects. These data can be converted to several formats and are available by 7.5-minute quadrangle, county, or watershed.
Charges vary based on computer time, labor, media, and delivery costs.