Digital Sanborn Maps Very detailed maps of New England towns and cities as they were in the 19th and early 20th centuries. There are several versions over time of most maps, 1867-1970.
GEOSCAN An index of maps and other publications from the Earth Science Center of Natural Resources Canada, with some links to online full text. More About Use
SimplyMap Create a personal account to use the database. A tool for creating maps illustrating hundreds of social, economic and climatic variables. More About Use
Social Explorer Maps illustrating Census data from 1790 to 2010, with recent community,religion, and carbon emissions data. More About Use