Find the bearing of straight lines
This is a simple wrapper around the geosphere function bearing() to return the
bearing (in degrees relative to north) of lines.
line_bearing(l, bidirectional = FALSE)
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 |
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.
Other lines:
angle_diff(),
geo_toptail(),
is_linepoint(),
line2df(),
line2points(),
line_breakup(),
line_match(),
line_midpoint(),
line_sample(),
line_segment(),
line_via(),
mats2line(),
n_sample_length(),
n_vertices(),
onewaygeo(),
points2line(),
toptail_buff(),
toptailgs(),
update_line_geometry()
lib_versions <- sf::sf_extSoftVersion()
lib_versions
# fails on some systems (with early versions of PROJ)
if (lib_versions[3] >= "6.3.1") {
bearings_sf_1_9 <- line_bearing(flowlines_sf[1:5, ])
bearings_sf_1_9 # lines of 0 length have NaN bearing
bearings_sp_1_9 <- line_bearing(flowlines[1:5, ])
bearings_sp_1_9
plot(bearings_sf_1_9, bearings_sp_1_9)
line_bearing(flowlines_sf[1:5, ], bidirectional = TRUE)
line_bearing(flowlines[1:5, ], bidirectional = TRUE)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.