Identify track points that intersect with a barrier polygon

This function identifies the segments of consecutive points that intersect with the barrier polygon feature. The result is a data frame of segment records that identify portions of the track that will need to be re-routed. The result from this function can be directly passed into the prt_nearestnode().

Usage

get_barrier_segments(trkpts, barrier)

Arguments

trkpts

Simple Feature points ('sf', 'sfc_POINT'/'sfc_MULTIPOINT') that represent track points. Order is accepted as is and the bounding box of trkpts should be within the bounding box of the barrier polygon.

barrier

Simple Feature polygon ('sf', 'sfc_POLYGON'/'sfc_MULTIPOLYGON') representing the barrier feature. Should be the same barrier as supplied to the prt_visgraph() function.

Value

data.frame representing segments of consecutive points that intersect with barrier feature. the start_pt and end_pt geometry columns represent the bookend points for each segment that do not intersect with the barrier feature. The n_pts

column is the number of points to be re-routed.