r2dra: R to DRA

In geomander: Geographic Tools for Studying Gerrymandering

R to DRA

Description

Project a plan at the precinct level down to blocks into a format that can be used with DRA. Projecting down to blocks can take a lot of time for larger states.

Usage

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

Arguments

precincts	Required. an sf dataframe of precinct shapes
plan	Required. Either a vector of district assignments or the name of a column in precincts with district assignments.
state	Required. the state postal code of the state
path	Optional. A path to try to save to. Warns if saving failed.
epsg	numeric EPSG code to planarize to. Default is 3857.

Value

tibble with columns Id, as used by DRA, identical to GEOID in census terms and District.

Examples

## Not run: 
# 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')

## End(Not run)

geomander documentation built on Sept. 1, 2025, 5:10 p.m.