Contains the required information and centroid coordinates for the 20 U. S. NCI Seer Registry areas.
data(sa99_data)
sa99_data structure:
row.names - character - Seer Registry abbreviation.
saName - Character - Registry Name
tracts - integer - Number of census tracts within state
c_X_00 - integer - centroid X in 2000 census
c_Y_00 - integer - centroid Y in 2000 census
c_X_10 - integer - centroid X in 2010 census
c_Y_10 - integer - centroid Y in 2010 census
/br The Seer Registry data set the information and centroid coordinates for the 20 NCI Seer Registries in the U. S.