Available downloadable data themes are: Elevation, Orthoimagery, Land Cover, Hydrography, Geographic Names, Boundaries, Transportation, Structures, while maps include: US Topo and Historical Topo. The National Map viewer also allows visualization and identification queries (but not downloads) of Other Featured Data, such as Scanned Topo Maps, Ecosystems, Protected Areas, Gap Analysis Program Land Cover, Wetlands, Public Land Survey System, and National Park Service Boundaries. In addition, a Natural Hazards panel is included to view hazards-related information, such as for earthquakes, floods, wildfires, and weather, along with the U.S. National Grid for emergency response.
To research and download historical USGS data, such as Digital Orthophoto Quadrangles or older high resolution orthoimagery and Digital Line Graphs, go to Earth Explorer.
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.
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