CookCensusTracts: Shapefile of Census Tracts in Cook County for 2000
In McSpatial: Nonparametric spatial data analysis

Description Format Source Examples

A map of census tracts in Cook County, Illinois with data on population, median household income, average floor area ratios, and average home ages.

A shape file with 1343 census tracts. Can be read directly into a GIS program.

SP_ID: An identification variable
AREA: Area of the tract in square miles
TRACT: Census tract number, including state and county codes
POPULATION: Population in 2000
HHMEDINC: Median household income in the census tract in 2000
FAR: Average floor area ratio for census tract in 2000. Calculated from Cook County assessment file
AGE: Average age of homes in 2000. Calculated from Cook County assessment file.
CHICAGO: Indicates whether the tract is part of the City of Chicago. O'Hare airport is NOT included in Chicago. It is identified in the variable CAREA.
CAREA: For Chicago observations, indicates the community area. Missing for suburban observations.

Daniel McMillen. Data are drawn from the U.S. Census and the Cook County Assessment File.

cook <- readShapePoly(system.file("maps/CookCensusTracts.shp",
  package="McSpatial"))
sampvar <- cook$CHICAGO==1|(!is.na(cook$CAREA)&cook$CAREA=="O'Hare")
chicago <- cook[sampvar==TRUE,]