US Topo - 25 of 32
US Topo FAQs - 32 Found
What data are used to make US Topo maps?
US Topo layers include information traditionally shown on topographic maps: contour elevations, geographic names, hydrography, boundaries, transportation, structures, forest cover, and Public Land Survey System. The maps also include layers not traditionally included on topographic maps, such as orthoimagery (scale-corrected aerial photographs) and shaded relief. Most of the data are acquired through partnerships with Federal agencies, States, and sometimes local or Tribal agencies. Some data are acquired through commercial procurement.
US Topo maps are primarily a repackaging of GIS data from The National Map. Contours are derived from the USGS 3D Elevation Program (3DEP) data, hydrography from the National Hydrography Dataset (NHD), and geographic names from the Geographic Names Information System (GNIS). Most other cartographic content comes from non-USGS sources, though some of this non-USGS data is served in GIS forms by USGS through The National Map.
US Topo maps published between mid-2010 and late 2015 use commercially licensed road data (except in Alaska, and in National Forests). Orthoimages in Hawaii and Alaska are commercially licensed data. Copyright notices must be retained when reusing these data; see this FAQ for more information.
For details on data sources, see the metadata file attached to each US Topo file.