CookCensusTracts: Shapefile of Census Tracts in Cook County for 2000

Description Format Source Examples

Description

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

Format

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.

Source

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

Examples

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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,]


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