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U. S. Geological Survey Mapping in the 21st Century

2000 - The National Elevation Dataset - The National Elevation Dataset (NED) is a seamless dataset of elevation values that is well-suited for graphic visualization and has been processed to minimize discontinuities and to fill in void areas that would otherwise be blemishes in graphic representations. NED has been developed by merging the highest-resolution, best-quality elevation data available across the United States into a seamless raster format.     Saint Louis Sample Area

2002 -- The National Map is a seamless, continuously maintained set of public domain geographic base information that serve as a foundation for integrating, sharing, and using other data easily and consistently.     Composite image of various data layers covering the western suburbs of Denver, Colorado

Learn more about USGS programs and products by visiting the following web sites.

U.S. Geological Survey Museum - This collection serves to illustrate important achievements and challenges to the Earth Sciences, to document the history of USGS, and to enlighten those who use the collection.     John Wesley Powell on the Colorado

Geographic Names Information System - The Geographic Names Information System (GNIS), developed by the USGS in cooperation with the U.S. Board on Geographic Names (BGN), contains information about almost 2 million physical and cultural geographic features in the United States. The Federally recognized name of each feature described in the data base is identified, and references are made to a feature's location by State, county, and geographic coordinates. The GNIS is our Nation's official repository of domestic geographic names information.

TerraServer - TerraServer contains 3.3 tera-bytes of high resolution USGS aerial imagery and USGS topographic maps. The Microsoft TerraServer Web site, a USGS Cooperative Research and Development Agreement, is one of the world's largest online databases, providing free public access to a vast data store of maps and aerial photographs of the United States. TerraServer is designed to work with commonly available computer systems and Web browsers over slow speed communications links. The TerraServer name is a play on words, with 'Terra' referring to the 'earth' or 'land' and also to the terabytes of images stored on the site.

    Confluence of the Mississippi and Missouri Rivers

TopoZone - TopoZone, through the USGS Business Partner Program, provides an interactive interface which allows users to view a seamless topographic map and feature database of the entire United States, based on digital raster graphics. The site is accessible to anyone with an industry standard Web browser at no charge.    

EarthExplorer - EarthExplorer allows users to query and order satellite images, aerial photographs, and cartographic products through the U.S. Geological Survey.

    The Missouri River and Lake Sakakawea in North Dakota - Image acquired from the EarthExplorer

GISDATA Web Mapping Portal
- GISDATA is provides access to geospatial datasets that have been specially prepared for seamless access and delivery. Some data serve many applications and have national extent. Other data were prepared for a particular time or event, and usually for a limited region.

    GISDATA Web Mapping Portal

19th Century Mapping           20th Century Mapping            21st Century Mapping

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