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Libraries

State Online Atlases

Illinois
The Illinois Site Selection Tool is no longer active. The contains geospatial data that can be downloaded for use with GIS.
Alabama
The web site has maps in PDF and JPEG formats that can be downloaded for viewing.
Arizona
Two interactive mapping sites are available for Arizona, the from the University of Arizona and the which has a limited number of themes available. Another interesting site is the which can be used to view topographic maps of the Grand Canyon and trail maps.
Arkansas
is an interactive mapping site with a limited number of map themes.
Colorado
An with maps and explanatory information on agriculture, infrastructure, physical geography and population available in PDF format.
Delaware
is a map viewer with base map data for the state.
Hawaii
The offers a limited number of static maps for Hawaii.
Idaho
has maps on a wide number of topics related to natural history. has a collection of geospatial data.
Indiana
can be used to create maps on a wide variety of topics, including geology, environment, biology, hydrology, infrastructure and demographics
Iowa
that contains base map and other data for the state.
Kentucky
is a resource that can be used to locate maps and data for Kentucky. Kentucky also has an .
Louisiana
The can be used to explore data on a wide variety of topics related to the state.
Maine
The is a collection of maps on a wide variety of topics developed by students at Colby College.
Massachusetts
The Online Data Viewer from has a wide variety of data layers.
Minnesota
The is an online version of the print Atlas of Minnesota, which was published in 2003. Some maps on this site are more up-to-date than the print atlas.
Mississippi
The is an interactive map server with data on a wide variety of topics.
Missouri
Two sites are available for Missouri: an and the .
Montana
offers PDF maps on a number of different topics for Montana.
Nebraska
include roads, dams, water bodies, hydrology units, elevation, SSURGO soils types, township/range/section, registered groundwater wells, floodplains and several years of aerials.
Nevada
is a site with links to sites that provide GIS data for Nevada on a variety of topics.
New Hampshire
from the University of New Hampshire.
New Jersey
Two interactive mapping sites for New Jersey, on the environment & natural history and geology can be found at .
New York
allows users to view tract and county maps. New York City also has an interactive mapping site, called . William A. Bowen has also developed聽 , which is part of the American Cities Atlas Project.
North Carolina
A wide variety of data is available on .
North Dakota
can be used to explore and view a wide variety of data on the state.
Oklahoma
The is available on CD-ROM in Government Information, Maps & Data Services. Oklahoma also has developed the , which allows users to view data on a wide variety of themes.
Oregon
The site allows users to explore data on a wide variety of topics.
Pennsylvania
is an environmental mapping tool for the state that has a wide variety of data.
Rhode Island Environmental Resource Map
The is an interactive mapping site with a wide variety of data on topics related to environmental management. Rhode Island also has an interactive viewer for .
South Carolina
A few data layers are available on the South Carolina , which will be expanded in the future.
Texas
A allows users to generate a Google map of a county. The site also has rural and community health data. The 1978 Atlas of Texas has been digitized by the .
Utah
is an index to maps of Utah that can be viewed online.
Vermont
The web site contains both static maps of Vermont and an .
Virginia
Several atlases for Virginia are available, including the and a .
Washington
A number of interactive map sites are available for Washington State. They include the , which provides links to several different geology-related interactive mapping systems, a , an , , a Herp (Herpetology) Atlas, and a .
West Virginia
Several interactive mapping applications can be accessed from the . West Virginia also has the , which provides maps on a variety of health related topics.
Wisconsin
The has a number of interactive mapping applications for the state of Wisconsin that allows users to view a wide variety of thematic maps.
Wyoming
Several interactive mapping sites are available for Wyoming including an interactive mapping site from the and an . The site has links to several other interactive mapping sites.