USAboundaries           USAboundaries: Historical and Contemporary
                        Boundaries of the United States of America
census_boundaries       Cartographic boundary files from the U.S.
                        Census Bureau
hist_us_counties        Boundaries of counties in the United States of
                        America, 1629-2000
hist_us_states          Boundaries of states in the United States of
                        America, 1783-2000
install_data_package    Install the 'USAboundariesData' package after
                        checking with the user
state_codes             State codes and abbreviations for U.S. states
                        and territories
us_boundaries           Get historical or contemporary boundaries of
                        the United States
us_congressional        Congressional district boundaries
                        (contemporary)
us_counties             County boundaries (contemporary and historical)
us_states               State boundaries (contemporary and historical)
