Get lines extremities

Source: R/geometrical_functions_sf.R

Generate a feature collection of points with the first and last vertex of each line in a feature collection of linestrings.

lines_extremities(lines)

Arguments

lines

A feature collection of linestrings (simple Linestrings)

Value

A feature collection of points

Examples

wkt_lines <- c(
"LINESTRING (0 0, 1 0)",
"LINESTRING (1 0, 2 0)",
"LINESTRING (2 0, 3 0)",
"LINESTRING (0 1, 1 1)")

linesdf <- data.frame(wkt = wkt_lines,
                      id = paste("l",1:length(wkt_lines),sep=""))

all_lines <- sf::st_as_sf(linesdf, wkt = "wkt")
all_lines <- cbind(linesdf$wkt,all_lines)
points <- lines_extremities(all_lines)