osm_consolidate: Consolidate roads into simplified network

In saferactive/traffiCalmr: Download and Analyse Data for Road Safety Research

Description

Consolidate roads into simplified network

Usage

osm_consolidate(x, segment = 500)

Arguments

x	a SF data frame of OSM linestrings with projected CRS
segment	numeric, max length of segments in metres

Details

This function simplifies a OSM road network by: 1) grouping small road segments into single names roads 2) splitting long roads into sections are defined by segment 3) Casting MULTILINESTRINGs into LINESTRING

Note: to avoid splitting short roads, roads are only split once they are 2x segment, but are then splits into lengths as defined by segment. For example a 600m road will not be split, but a 1100m road will be split into approximately 500m segments when segment = 500.

Value

Returns an data frame of LINESTRINGS

See Also

Other OSM: cluster_junction(), line_segment_sf(), nn_line(), nn_point(), osm_get_junctions(), osm_main_roads()

Examples

library(sf)
osm = osm_main_roads(tc_data_osm)
x = sf::st_transform(osm, 27700)
osm_consolidated_200m = osm_consolidate(x, segment = 200)
nrow(x)
nrow(osm_consolidated_200m) / nrow(x) # fewer lines
table(x$name)
table(osm_consolidated_200m$name)
plot(x$geometry, col = 1:nrow(x))
plot(osm_consolidated_200m$geometry, col = 1:nrow(osm_consolidated_200m))
summary(sf::st_length(x))
summary(sf::st_length(osm_consolidated_200m))

saferactive/traffiCalmr documentation built on Nov. 18, 2021, 5:06 a.m.