This function returns the bearing (in degrees relative to north) of lines.
Arguments
- l
A spatial lines object
- bidirectional
Should the result be returned in a bidirectional format? Default is FALSE. If TRUE, the same line in the oposite direction would have the same bearing
Details
Returns a boolean vector. TRUE means that the associated line is in fact a point (has no distance). This can be useful for removing data that will not be plotted.
See also
Other lines:
angle_diff(),
geo_toptail(),
is_linepoint(),
line2df(),
line2points(),
line_breakup(),
line_midpoint(),
line_segment1(),
line_segment(),
line_via(),
mats2line(),
n_segments(),
n_vertices(),
onewaygeo(),
points2line(),
toptail_buff()
Examples
l <- flowlines_sf[1:5, ]
bearings_sf_1_9 <- line_bearing(l)
bearings_sf_1_9 # lines of 0 length have NaN bearing
#> [1] -92.04942 -102.44566 -143.83660 -173.33154 170.51696
b <- line_bearing(l, bidirectional = TRUE)
r <- routes_fast_sf[1:5, ]
b2 <- line_bearing(r, bidirectional = TRUE)
plot(b, b2)
