Obtain feature geometry for 2020 voting districts, which align with voting districts for the 2020 PL-94171 redistricting data from the US Census Bureau.
voting_districts(state = NULL, county = NULL, cb = FALSE, year = 2020, ...)The state for which you'd like to retrieve data. Can be a state name,
state abbreviation, or FIPS code. When NULL and combined with
cb = TRUE, a national dataset of voting districts will be returned.
The county for which you are requesting data. Can be a county name or
FIPS code. If NULL (the default), data for the entire state will
be returned.
If cb is set to TRUE, download a generalized (1:500k) cartographic boundary file. Defaults to FALSE (the most detailed TIGER/Line file).
The data year; defaults to 2020. An older voting districts dataset from the
2012 TIGER/Line shapefiles is available with year = 2012.
arguments to be passed to the underlying `load_tiger` function, which is not exported.
Options include class, which can be set to "sf" (the default) or "sp" to
request sf or sp class objects, and refresh, which specifies whether or
not to re-download shapefiles (defaults to FALSE).
The US Census Bureau describes voting districts as follows: Voting district (VTD) is a generic term adopted by the Bureau of the Census to include the wide variety of small polling areas, such as election districts, precincts, or wards, that State and local governments create for the purpose of administering elections. Some States also use groupings of these entities to define their State and local legislative districts, as well as the districts they define for election of members to the U.S. House of Representatives. In a nationwide cooperative program for the 1980 census, the Census Bureau gave States the opportunity to request use of these election precinct boundaries as the boundaries of #' census enumeration districts (EDs) or, in some areas, census blocks.
Support for voting districts in tigris 1.5 and higher is aligned with the 2020 PL redistricting
data. The argument cb = FALSE retrieves voting districts from the TIGER/Line PL
shapefiles. A generalized version from the cartographic boundary dataset is available with the
argument cb = TRUE.
https://www2.census.gov/geo/pdfs/reference/GARM/Ch14GARM.pdf
Other legislative district functions:
congressional_districts(),
state_legislative_districts()
# NOT RUN {
#'
library(tigris)
ia <- voting_districts("Iowa")
plot(ia$geometry)
# }
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