U.S. Fish & Wildlife ServiceWetland to Impervious Surface Difference Product for US Census Tracts in the contiguous U.S. Census tracts with ≤0.5% of wetland to impervious surface difference, calculated by area, are displayed in light orange, while those that have greater than 0.5% difference are displayed in dark orange. The ≤0.05% category is filtered out in many web maps to improve performance. Patterns are largely controlled by the age of National Wetlands Inventory (NWI) data and land cover trends, including the addition or increase in pond and lake area via natural and anthropogenic forces. Areas exhibiting the greatest amount of difference (i.e., change) include the Prairie Pothole Region and the southeastern U.S. Geographies with the greatest levels of difference could be prioritized for NWI updates.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/6c0b915445074b36b266140143beadec_3engU.S. Fish and Wildlife Service Open DataPublicwetland to nlcd impervious surface [United States]Web servicesUnited StatesLast Modified: 2023-12-05