geo_toptail: Clip the first and last n metres of SpatialLines

In stplanr: Sustainable Transport Planning

Clip the first and last n metres of SpatialLines

Description

Takes lines and removes the start and end point, to a distance determined by the user.

Usage

geo_toptail(l, toptail_dist, ...)

Arguments

l	An sf object representing lines
toptail_dist	The distance (in metres) to top and tail the line by. Can either be a single value or a vector of the same length as the SpatialLines object.
...	Arguments passed to sf::st_buffer()

Details

Note: see the function toptailgs() in stplanr v0.8.5 for an implementation that uses the geosphere package.

See Also

Other lines: angle_diff(), is_linepoint(), line2df(), line2points(), line_bearing(), line_breakup(), line_midpoint(), line_segment(), line_via(), mats2line(), n_vertices(), onewaygeo(), points2line(), toptail_buff()

Examples

lib_versions <- sf::sf_extSoftVersion()
lib_versions
# dont test due to issues with sp classes on some set-ups
if (lib_versions[3] >= "6.3.1") {
  l <- routes_fast_sf[2:4, ]
  l_top_tail <- geo_toptail(l, 300)
  l_top_tail
  plot(sf::st_geometry(l_top_tail))
  plot(sf::st_geometry(geo_toptail(l, 600)), lwd = 9, add = TRUE)
}

stplanr documentation built on Sept. 15, 2023, 9:07 a.m.