Convert an R Plan to DRA Block Assignment Format — r2dra • geomander

Project a plan defined on precincts down to 2020 census blocks and return the two-column format expected by DRA exports.

Usage

r2dra(precincts, plan, state, path, epsg = 3857)

Arguments

precincts: sf object of precinct geometries.
plan: Either a vector of district assignments aligned with precincts, or the name of a column in precincts containing those assignments.
state: State postal abbreviation used to fetch 2020 blocks.
path: Optional output path. If supplied, the result is written as CSV and also returned.
epsg: numeric EPSG code to planarize to. Default is 3857.

Value

tibble with columns GEOID20 and District, suitable for writing to a DRA-style CSV.

Examples

if (FALSE) { # \dontrun{
# Needs Census Bureau API
cd <- tinytiger::tt_congressional_districts() |> filter(STATEFP == '49')
cnty <- tinytiger::tt_counties(state = 49)
matchedcty <- geo_match(from = cnty, to = cd)
# use counties as precincts and let the plan be their center match:
r2dra(cnty, matchedcty, 'UT', 'r2dra_ex.csv')
} # }