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The National Map Viewer and Download Platform

International users should first set your Internet browser language to "English/United States" to be able to access The National Map viewer and Download Platform. Click here to go to the viewer.

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.

Data include: Elevation, Orthoimagery, Hydrography, Geographic Names, Boundaries, Transportation, Structures, and Land Cover, while products include: US Topo and Historical Topo Maps. The National Map Viewer also allows visualization and identification queries (but not downloads) of Other Featured Data, to include Scanned Topo Maps, Ecosystems, Protected Areas, Gap Analysis Program Land Cover, Wetlands, Public Land Survey System, and National Park Service Boundaries. Also included is a Natural Hazards panel 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.

Help- What's New, Quick Guide, Base Maps, Map Display, Toolbox, Search, Overlays, Selection, Download

FAQs - The National Map Viewer FAQs

Services list icon Services List - Web map service endpoints used in The National Map Viewer

New: Using TNM services to enable your web and mobile mapping efforts

Recommended Browsers: Firefox - Chrome - Internet Explorer 7 or higher

Can't see Flash? Install Flash Player or view text version.

How to download National Elevation Dataset (NED) data using The National Map Viewer

Bare earth digital elevation model (DEM) data is accessed with the following procedures:

  1. Zoom to your area of interest.
  2. Turn on the Elevation Availability layer to see coverage of best available NED resolution.
  3. Click the Download Data tool near the upper right corner of the Viewer banner.
  4. Use a bounding box, or choose a reference area in the Download options menu, or select by current map extent or coordinate input.
  5. Select the Elevation theme.
  6. Select NED products, such as 2 arc-second (Alaska only), 1 arc-second (conterminous U.S. and Territorial Islands, Hawaii, Puerto Rico, portions of Alaska, most of Canada, and all of Mexico), 1/3 arc-second (conterminous U.S. and Territorial Islands, Hawaii, and portions of Alaska), or 1/9 arc-second (in limited areas of U.S. only).
  7. Add selected NED products to the Cart.
  8. Click on the product in the Cart to view footprints and to initiate download of selected individual products.
  9. Checkout and enter your e-mail address twice to place your order to receive the complete list of download links in one message.

Although you will not initially see an Elevation theme in The National Map Viewer's table of contents, click on the "+" signs under the Elevation Availability layer to open additional content and see colored legends for each resolution. Be aware that NED 1- and 1/3-arc-second elevation products are available as staged data in 1x1 degree tiles in either ArcGrid, GridFloat, or IMG formats, while NED 1/9-arc-second elevation products are available as staged data in 15x15 minute tiles in IMG format only.

The National Map - Mashup Gallery

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.

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Page Last Modified: Tuesday, 23-Dec-2014 16:02:22 EST