Build shapes from GTFS data
Value
The gtfs feed with the shapes attribute defined and the trips updated with the matching shape_id.
Details
The function builds the shapes.txt file from the stop_times.txt and stops.txt files, by grouping trips with the same stop sequence and assigning them the same shape_id. The resulting shapes are a simplified version of the original ones, as they do not take into account the actual path followed by the vehicles, but only the stop sequence. This can be useful for some applications that do not require high precision in the shapes, and can be used as a fallback when the original feed does not include shapes.txt file.
Examples
if (FALSE) { # \dontrun{
gtfs <- GTFShift::load_feed("gtfs.zip")
gtfs <- GTFShift::build_shapes(gtfs)
} # }