Get historical United States Congressional District Shapefiles

Data sourced from the United States Congressional District Shapefiles, primarily hosted at https://cdmaps.polisci.ucla.edu/. Files are fetched through the GitHub repository at https://github.com/JeffreyBLewis/congressional-district-boundaries.

get_lewis(state, congress, path_only = FALSE)

Arguments

state: two letter state abbreviation
congress: congress number, from 1 to 114.
path_only: logical. If TRUE, returns only the URL to the file.

Value

a sf tibble of the congressional district boundaries

References

Jeffrey B. Lewis, Brandon DeVine, Lincoln Pitcher, and Kenneth C. Martis. (2013) Digital Boundary Definitions of United States Congressional Districts, 1789-2012. [Data file and code book]. Retrieved from https://cdmaps.polisci.ucla.edu on [date of download].

Examples

path <- get_lewis(state = 'NM', congress = 111, path_only = TRUE)
#> Data sourced from the United States Congressional District Shapefiles
#> <https://cdmaps.polisci.ucla.edu/>.
#> This message is displayed once per session.
if (attr(curlGetHeaders(path), 'status') == 200) {
  get_lewis(state = 'NM', congress = 111)
}
#> Simple feature collection with 3 features and 16 fields
#> Geometry type: POLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -109.0502 ymin: 31.3323 xmax: -103.002 ymax: 37.00023
#> Geodetic CRS:  NAD83
#> # A tibble: 3 × 17
#>   statename district startcong endcong id    districtsi county page  law   note 
#>   <chr>        <dbl>     <dbl>   <dbl> <chr> <chr>      <chr>  <chr> <chr> <chr>
#> 1 New Mexi…        1       108     112 0351… ""         ""     ""    ""    ""   
#> 2 New Mexi…        2       108     112 0351… ""         ""     ""    ""    ""   
#> 3 New Mexi…        3       108     112 0351… ""         ""     ""    ""    ""   
#> # ℹ 7 more variables: bestdec <chr>, finalnote <chr>, rnote <chr>,
#> #   lastchange <dttm>, fromcounty <chr>, statefp <chr>, geometry <POLYGON [°]>