geomander (version 2.3.0)

block2prec_by_county: Aggregate Block Table by Matches and County

Description

Performs the same type of operation as block2prec, but subsets a precinct geometry based on a County fips column. This helps get around the problem that county geometries often have borders that follow rivers and lead to funny shaped blocks. This guarantees that every block is matched to a precinct which is in the same county.

Usage

block2prec_by_county(block_table, precinct, precinct_county_fips, epsg = 3857)

Value

dataframe with nrow(precinct) rows

Arguments

block_table

Required. Block table output from create_block_table

precinct

sf dataframe of shapefiles to match to.

precinct_county_fips

Column within precincts

epsg

numeric EPSG code to planarize to. Default is 3857.

Examples

if (FALSE) {
# Need Census API
data(towns)
towns$fips <- '087'
block <- create_block_table('NY', 'Rockland')
block2prec_by_county(block, towns, 'fips')
}