Use The National Map Viewer and Download Platform to visualize, inspect, and download our most current topographic base map data and products for free. Managed by the USGS National Geospatial Program (NGP), The National Map Viewer provides access to all eight primary data themes of The National Map to include US Topo and historical topographic map products. The viewer platform is extended upon the National Geospatial Intelligence Agency's (NGA) Palanterra x3 Viewer.
To research and download historical USGS data, such as Digital Orthophoto Quadrangles and Digital Line Graphs, or to access lidar point cloud data, go to Earth Explorer.
The Seamless Server Viewer was retired on July 31, 2012
Retirement of the Seamless Server Viewer culminated efforts by NGP to transition multiple viewers into just one viewer to create a one-stop location for visualization and delivery of its public domain vector and raster data. The National Map Viewer offers similar capabilities for service access and data download previously available through the Seamless Server Viewer.
Below are mashup examples of how The National Map Services and other Science, National, Local, or Emergency services can be used to create online maps in The National Map Viewer or in other viewers.
The first three featured mashups are the top recognized mashup submissions that were part of The National Map User Conference (2011) Mashathon event as recognized by their peers. The categories were: Earth Science; Local, Tribal, Project Case Study; and Innovative Technology.
Other examples are featured collaborations between The National Map and the project area. >> more
Event Mashups highlight Emergency Response, Special Event, or Conferences Demonstrations. These mashups are not necessarily hosted or made by, but are using The National Map. For finding The National Map Hazard Digital Data Special Products library as hosted on HDDS, click more. >> more
These are legacy The National Map viewers that either have been retired or will be retired soon. The popular functionality and capability of these viewers will be maintained in the new viewers