R: Download a state legislative districts shapefile into R -...

state_legislative_districts {tigris}

R Documentation

Download a state legislative districts shapefile into R - upper or lower

Description

This function allows you to download boundaries for state legislatures into R. Generally, state legislatures are comprised of an "upper" house, which is typically referred to as the Senate, and a "lower" house, which is often (but not exclusively) referred to as the House. The exception is Nebraska, which has a unicameral state legislature.

Usage

state_legislative_districts(
  state = NULL,
  house = "upper",
  cb = FALSE,
  year = NULL,
  ...
)

Arguments

`state`	The two-digit FIPS code (string) of the state. Can also be state name or abbreviation (case-insensitive). When `NULL` and combined with `cb = TRUE`, a national dataset of state legislative districts will be returned.
`house`	Specify here whether you want boundaries for the `upper` or `lower` house. Defaults to `upper`.
`cb`	If cb is set to TRUE, download a generalized (1:500k) cartographic boundary file. Defaults to FALSE (the most detailed TIGER/Line file).
`year`	the data year; defaults to 2022
`...`	arguments to be passed to internal function `load_tiger`, which is not exported. See Additional Arguments.

Additional Arguments

Additional arguments that can be passed in ... are:

class Desired class of return object: "sf" (the default) or "sp". sp classes should be considered deprecated as of tigris version 2.0, but legacy support is still available.
progress_bar If set to FALSE, do not display download progress bar (helpful for R Markdown documents). Defaults to TRUE.
keep_zipped_shapefile If set to TRUE, do not delete zipped shapefile (stored in temporary directory or TIGRIS_CACHE_DIR depending on the configuration of global option "tigris_use_cache"). Defaults to FALSE.
refresh Whether to re-download cached shapefiles (TRUE or FALSE) . The default is either FALSE or the value of global option "tigris_refresh" if it is set. Specifying this argument will override the behavior set in "tigris_refresh" global option.
filter_by Geometry used to filter the output returned by the function. Can be an sf object, an object of class bbox, or a length-4 vector of format c(xmin, ymin, xmax, ymax) that can be converted to a bbox. Geometries that intersect the input to filter_by will be returned.

Examples

## Not run: 
library(tigris)
library(leaflet)

leg <- state_legislative_districts("Maine", "lower", cb = TRUE)

leaflet(leg) %>%
  addProviderTiles("CartoDB.Positron") %>%
  addPolygons(fillColor = "white",
              color = "black",
              weight = 0.5)

## End(Not run)