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Use tigris to get state-level data from the U.S. Census Bureau

Source: R/get_tigris_data.R
get_state_tigris.Rd

Use the tigris package to download state-level data from the U.S. Census Bureau API and optionally filter by name or GeoID.

Usage

get_tigris_data(
  type = NULL,
  state = getOption("getdata.state"),
  location = NULL,
  dist = getOption("getdata.dist"),
  diag_ratio = getOption("getdata.diag_ratio"),
  unit = getOption("getdata.unit", "meter"),
  asp = getOption("getdata.asp"),
  crs = getOption("getdata.crs", default = 3857),
  name = NULL,
  name_col = c("name", "namelsad", "geoid"),
  cb = TRUE,
  clean_names = TRUE,
  cache = TRUE,
  ...
)

Arguments

type

Type of data to return, Default: NULL; See details for supported options.

state

State name, abbreviation, or GeoID. Required. Defaults to getOption("getdata.state").

location

A sf, sfc, or bbox object passed to sfext::st_bbox_ext() and used to create the geometry passed to the filter_by parameter passed to the tigris functions.

dist

buffer distance in units. Optional.

diag_ratio

ratio of diagonal distance of area's bounding box used as buffer distance. e.g. if the diagonal distance is 3000 meters and the "diag_ratio = 0.1" a 300 meter will be used. Ignored when dist is provided.

unit

Units for buffer. Supported options include "meter", "foot", "kilometer", and "mile", "nautical mile" Common abbreviations (e.g. "km" instead of "kilometer") are also supported. Distance in units is converted to units matching GDAL units for x; defaults to "meter"

asp

Aspect ratio of width to height as a numeric value (e.g. 0.33) or character (e.g. "1:3"). If numeric, get_asp() returns the same value without modification.

crs

Coordinate reference system of bounding box to return; defaults to NULL which maintains the crs of the input object.

name, name_col

Name and columns to filter by name. name defaults to NULL, and name_col defaults to c("namelsad", "namelsad", "geoid") columns.

cb

If TRUE, download a generalized (1:500k) file. If FALSE, download the most detailed TIGER/Line file. Defaults to TRUE (reverse of the default for tigris functions). This parameter is not used when type is set to blocks, roads, primary secondary roads, area water, linear water, landmarks, or zctas.

clean_names

If TRUE, set .name_repair to janitor::make_clean_names(); defaults to TRUE.

cache

If TRUE, set options(tigris_use_cache = TRUE) to cache downloaded tigris data. Ignored if getOption("tigris_use_cache") is not NULL.

...

Additional parameters passed on to tigris functions.

Value

A simple feature object matching the type provided.

Details

Supported data types:

Different type values corresponded to different tigris functions for downloading from the U.S. Census Bureau API include. Supported options include: "counties", "census places", "congressional districts", "legislative districts", "senate district", "tracts", "block groups", "blocks", "pumas", "voting districts", "zctas", "roads", "primary secondary roads", "area water", "linear water", and "landmarks".

tigris functions that do not use a "state" parameter (e.g. tigris::coastline or tigris::rails) are not supported by this function. Note that the default value of the cb parameter for get_tigris_data is TRUE and the default value of for the original tigris package is FALSE.