zip2012 {skm} | R Documentation |
a zip code database with latitude, longitude, population and income.
zip2012
A data table with 28844 rows and 9 variables:
zip code, 5 digits zip code in U.S.
latitude
longitude
population
income
city
state
percentage of population w.r.t total population
percentage of income w.r.t total income
http://federalgovernmentzipcodes.us/