Research Guide on Statistical Sources

Census Flows Mapper  This interactive map includes tracking of county to county migrations.

Dag Hammarskjold Library, United Nations

Darthmouth  This library's research guide on locating geospatial data is very comprehensive.

Gap Minder

GeoRef 

Historical Maps Online (This resource charts historical development in Illinois and the Northwest Territories over the last 400 years).

Nation Master This resource allows for comparisons between countries and provides access to maps.

The National Map (United States Geological Survey) 

World Digital Library

World Map Collections

In addition to the above online resources, the library also has the following print resource:

The Almanac of State Legislatures: Changing Patterns, 1990-1997. William Lilley, et. al. Congressional Quarterly, 1998, 2nd ed. G1201.F7 L5 1998. This resource highlights changes with legislature maps over time.