Description: US States admitted by 1820 with attributes about admission to the Union, plus territories added by 1820 from British Cession of 1818 and Spanish Cession of 1819. Based on USGS National Atlas and Natural Earth 10M scale data.
Description: US States and Territories in 1854, with the Gadsden Purchase area partitioned out. Includes slavery status attributes. For 1:20M scale display.
Copyright Text: Maps.com, USGS, Minnesota Population Center. National Historical Geographic Information System: Version 2.0. Minneapolis, MN: University of Minnesota 2011.