The National Map - Data Delivery
The National Map Data Download and Visualization Services
This site provides applications and web map services for accessing ‘Topographic Information for the Nation’. This information includes topographic maps, and GIS data for: elevation; hydrography; watersheds; geographic names; orthoimagery; governmental units/boundaries; transportation; and land cover. - Notifications about Changes -
The “USGS Topo Base Map” service named “USGS Topo” has been refreshed with new data and design changes. In addition, several of the “Data Availability”, or “Data Index” services have new cloud hosted URLs.