lwgeom (version 0.2-14)

st_linesubstring: get substring from linestring

Description

get substring from linestring

Usage

st_linesubstring(x, from, to, tolerance, ...)

Value

object of class sfc

Arguments

x

object of class sfc, sf or sfg

from

relative distance from origin (in [0,1])

to

relative distance from origin (in [0,1])

tolerance

tolerance parameter, when to snap to line node node

...

ignored

Examples

library(sf)
lines = st_sfc(st_linestring(rbind(c(0,0), c(1,2), c(2,0))), crs = 4326)
spl = st_linesubstring(lines, 0.2, 0.8) # should warn
plot(st_geometry(lines), col = 'red', lwd = 3)
plot(spl, col = 'black', lwd = 3, add = TRUE)
st_linesubstring(lines, 0.49999, 0.8) # three points
st_linesubstring(lines, 0.49999, 0.8, 0.001) # two points: snap start to second node