mapsf (version 0.11.0)

mf_get_links: Get a link layer from a data.frame of links

Description

Create a link layer from a data.frame of links and an sf object.

Usage

mf_get_links(x, df, x_id, df_id)

Value

An sf object is returned, it is composed of df and the sfc (LINESTRING) of links.

Arguments

x

an sf object, a simple feature collection.

df

a data.frame that contains identifiers of starting and ending points.

x_id

name of the identifier variable in x, default to the first column (optional)

df_id

names of the identifier variables in df, character vector of length 2, default to the two first columns. (optional)

Examples

mtq <- mf_get_mtq()
mob <- read.csv(system.file("csv/mob.csv", package = "mapsf"))
# Select links from Fort-de-France (97209))
mob_97209 <- mob[mob$i == 97209, ]
# Create a link layer
mob_links <- mf_get_links(x = mtq, df = mob_97209)
# Plot the links
mf_map(mtq)
mf_map(mob_links, col = "red4", lwd = 2, add = TRUE)