A large collection of global and continental thematic maps. From the Socioeconomic Data and Applications Center and the Center for International Earth Science Information Network at Columbia University. A login is required, but registration is free.
Library database that contains a complete collection of these maps for RI, in B/W.
Sanborn Maps, 1867-1970 provide digital access to large-scale maps of Rhode Island. Founded in 1867 by D. A. Sanborn, the Sanborn Map Company was the primary American publisher of fire insurance maps for nearly 100 years. These maps are valuable historical tools for urban specialists, social historians, architects, geographers, genealogists, local historians, planners, environmentalists to learn about the history, growth, and development of American cities, towns, and neighborhoods. A key is provided by the Sanborn Map Company. (Note: Because the key is a detailed file, it must be large so that you can view it completed. As a result, it may take a while for the key to load onto your computer screen.)