This online atlas lets users create, manipulate, and download accurate and current maps and geospatial datasets. Datasets are available for the State of Arizona and Pima County on the following themes: natural resources, people and society, business and economics, and people and environment. Users select one of the themes to access an interactive map viewer, select political and cultural features, spatial data, and create a map that can be printed or downloaded. The web site includes a help page with tutorials, a frequently-asked-quesions feature, and a glossary. There are also teaching modules and links to online resources to assist educators in developing assignments that use atlas resouces, and a gallery of previously prepared maps that can be downloaded or printed.