stplanr (version 0.5.0)

line_bearing: Find the bearing of straight lines

Description

This is a simple wrapper around the geosphere function bearing() to return the bearing (in degrees relative to north) of lines.

Usage

line_bearing(l, bidirectional = FALSE)

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_match(), line_midpoint(), line_sample(), line_segment(), line_via(), mats2line(), n_sample_length(), n_vertices(), onewaygeo(), onewayid(), points2line(), toptail_buff(), toptailgs(), update_line_geometry()

Examples

# NOT RUN {
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)
# }