Primary Sources

The American Geographical Society Library (AGSL), one of the premier collections of its kind in North America, contains over 1.3 million items supporting instruction, research and outreach at the University of Wisconsin-Milwaukee and around the world.

The home of the U.S. Government’s open data. Here you will find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more.

The David Rumsey Map Collection was started over 30 years ago and contains more than 150,000 maps. The collection focuses on rare 16th through 21st century maps of North and South America, as well as maps of the World, Asia, Africa, Europe, and Oceania. The collection includes atlases, wall maps, globes, school geographies, pocket maps, books of exploration, maritime charts, and a variety of cartographic materials including pocket, wall, children's, and manuscript maps. Items range in date from about 1550 to the present.

High-resolution scans of more than 178,000 historical topographic maps of the United States.

"The maps in this category show a geographic area larger than a city or town and do not display a subject that is part of one of the thematic categories [of the digital collections]."

The easy-to-use getaway to historical maps in libraries around the world.

Find data about the U.S., such as demographic and economic data, population, and maps. Get information about the 2020 U.S. Census.