The National Map also serves as the data source for modern USGS topographic maps such as US Topos and OnDemand Topos. In addition, The National Map provides continuously-updated, seamless datasets for recreational trails, roads, boundaries, structures, land cover, and imagery. Included in The National Map are the latest elevation data from the 3D Elevation Program (3DEP), surface water data from the National Hydrography Datasets (NHD), and place name data from the Geographic Names Information System (GNIS). The National Map is a collection of free, nationally-consistent geographic datasets that describe the landscape of the United States and its territories.
