Record Search Query: [Keyword='National Elevation Dataset']
The USGS National Map Viewer
Entry ID: USGS_National_Map
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Abstract: The National Map viewer is the USGS's geographic information system (GIS)
application which is designed to provide easy access to geospatial information.
The viewer is a Web-enabled portal to all of the geospatial information
contained in The National Map. This portal not only supports on-line access to
the geospatial information, but also allows the download of digital data and
creation of ... cartographic products.
The National Map
The National Map provides public domain core geographic data about the United
States and its territories that other agencies can extend, enhance, and
reference as they concentrate on maintaining other data that are unique to
their needs. The National Map will be a foundation of information to which the
private sector can contribute core feature content and to which proprietary
datasets can be linked to provide access to higher resolution data, additional
(non-base) features, and enriched attribute information. The National Map will
promote cost effectiveness by minimizing the need to find, develop, integrate,
and maintain geographic base data each time they are needed.
The National Map will provide data and operational capabilities that include
1. High-resolution digital orthorectified imagery from aerial photographs or
satellite imagery that will provide some of the feature information now
symbolized on topographic maps.
2. High-resolution surface elevation data including bathymetry to derive
contours for primary series topographic maps and to support Earth surface
modeling and the production of accurate orthorectified imagery.
3. Vector feature data for hydrography (rivers and water bodies),
transportation (roads, railways, and waterways), structures, government unit
boundaries, and publicly-owned lands boundaries.
4. Geographic names for physical and cultural features to support the U.S.
Board on Geographic Names and other names such as for highways and streets.
5. Land cover data that classify the land surface into categories such as open
water and high-density residential.
The National Map is a new perspective on geographic base information. By
sharing its vision, the USGS affirms its dedication to refocusing and
reinvigorating its efforts to meet the Nation's needs for this critical
information. The USGS will consolidate and redefine its component mapping
activities and seek creative partnerships to ensure that current, complete,
consistent, and accurate information is available and useful to the Nation. It
will take sustained commitment to achieve the full goals of The National Map
vision. In the near future, the USGS and its partners will concentrate on
improving data and map content and currentness for high priority areas, with
emphasis on building long-term partnerships, and on improving data access and
[Summary provided the USGS]
ISO Topic Category
Access Constraints MS Internet Explorer 5.0 or higher
Netscape 4.7, 6.1 or higher
Mozilla 1.3 or higher
Requires a minimum screen resolution of 800 by 600 pixels to display properly.
Higher screen resolutions are recommended. The application is best viewed at a
screen resolution of 1024 by 768 pixels.
Creation and Review Dates