seam_adj {geomander}

Filter Adjacency to Edges Along Border

Description

Filter Adjacency to Edges Along Border

Usage

seam_adj(adj, shp, admin, seam, epsg = 3857)

Arguments

adj

zero indexed adjacency graph

shp

tibble to subset and where admin column is found

admin

quoted name of administrative unit column

seam

administrative units to filter by

epsg

numeric EPSG code to planarize to. Default is 3857.

Value

subset of adj

Examples

data('rockland')
data('orange')
data('nrcsd')

o_and_r <- rbind(orange, rockland)
o_and_r <- o_and_r %>%
  geo_filter(nrcsd) %>%
  geo_trim(nrcsd)
adj <- adjacency(o_and_r)

seam_adj(adj, shp = o_and_r, admin = 'county', seam = c('071', '087'))