Convert DRA Export Data to an R Spatial Object — dra2r • geomander

Read a DRA block assignment export and attach it to 2020 census blocks, optionally collapsing the assignments to a precinct layer.

Usage

dra2r(dra, state, precincts, epsg = 3857)

Arguments

dra: Path to a DRA CSV export, or a dataframe containing columns GEOID20 and District.
state: State postal abbreviation used to fetch 2020 blocks.
precincts: Optional sf object of precinct shapes. If supplied, the function assigns each precinct the most common block-level district among the blocks matched to it.
epsg: numeric EPSG code to planarize to. Default is 3857.

Value

sf object at the block level when precincts is omitted, or at the precinct level when precincts is supplied.

Examples

if (FALSE) { # \dontrun{
# Needs Census Bureau API
# dra_utah_test is available at https://bit.ly/3c6UDKk
blocklevel <- dra2r('dra_utah_test.csv', state = 'UT')
} # }