The Census PUMAs covering the 7-county Chicago Metropolitan Agency for Planning (CMAP) region. From the US Census Bureau's TIGER/Line shapefiles, 2023 vintage.
puma_sfFormat
A multipolygon sf object with 60 rows and 4
variables:
- geoid_puma
Unique 7-digit PUMA ID, assigned by the Census Bureau. Character.
- name
A Census-assigned name to help describe a PUMA's extent. Character.
- sqmi
Area in square miles. Double.
- geometry
Feature geometry.
sfmultipolygon.
Source
US Census Bureau TIGER/Line
Details
Census Bureau description:
"Public Use Microdata Areas (PUMAs) are geographic areas for which the Census Bureau provides selected extracts of raw data from a small sample of census records that are screened to protect confidentiality. These extracts are referred to as public use microdata sample (PUMS) files.
"PUMAs are statistical geographic areas defined for the tabulation and dissemination of American Community Survey (ACS) and Puerto Rico Community Survey Public Use Microdata Sample (PUMS) data as well as ACS period estimates, and decennial census data. Nesting within states or equivalent entities, PUMAs cover the entirety of the United States, Puerto Rico, Guam, and the U.S. Virgin Islands. PUMA delineations are subject to population threshold criteria, “building block” geography criteria, and geographic nesting criteria. State Data Centers (SDCs) define PUMAs with the cooperation of regional, state, local, and tribal governments, organizations, and other interested data users. Each PUMA must have a minimum population of 100,000 at the time of delineation and throughout the decade.
Examples
# Display the PUMAs with ggplot2
library(ggplot2)
ggplot(puma_sf) + geom_sf(lwd = 0.1) + theme_void()
