stplanr (version 0.4.0)

toptailgs: 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. Uses the geosphere::distHaversine function and requires coordinates in WGS84 (lng/lat).

Usage

toptailgs(l, toptail_dist, tail_dist = NULL)

Arguments

l

A SpatialLines object

toptail_dist

The distance (in metres) to top the line by. Can be either a single value or a vector of the same length as the SpatialLines object. If tail_dist is missing, is used as the tail distance.

tail_dist

The distance (in metres) to tail the line by. Can be either a single value or a vector of the same length as the SpatialLines object.

See Also

Other lines: angle_diff, geo_toptail, is_linepoint, line2df, line2points, line_bearing, line_match, line_midpoint, line_sample, line_segment, line_via, mats2line, n_sample_length, n_vertices, onewaygeo, onewayid, points2line, toptail_buff, update_line_geometry

Examples

# NOT RUN {
data("routes_fast")
rf <- routes_fast[2:3, ]
r_toptail <- toptailgs(rf, toptail_dist = 300)
plot(rf, lwd = 3)
plot(r_toptail, col = "red", add = TRUE)
plot(cents, add = TRUE)
# }