Office of the Chief Technology OfficerThe dataset contains basemap features that are typically classified as impervious surface, captured in 2010. Some examples of Impervious Surfaces include: Airport Taxiways, Helipads, Outdoor Building Stairs, Buildings, Sidewalks, Roads, Alleys, Driveways, and Swimming Pools.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/663ab6cc4e3749929482cd0aafddb4f7_15engOpen Data DCPublicImpervious Surface 2010 [District of Columbia--Washington]Web servicesDistrict of Columbia--WashingtonDistrict of Columbia2010