Build shapes from simple feature object

Usage

create_shapes_from_sf(sf_shapes, gtfs)

Arguments

sf_shapes: sf object associating shape_id with an sf object (either LINESTRING or MULTILINESTRING)
gtfs: tidygtfs. GTFS feed.

Value

A data.table representing a GTFS shapes table.

Details

This function builds the shapes.txt file from a simple feature object. It first converts any MULTILINESTRING geometries to LINESTRING geometries using the multiline_to_sorted_linestring, with the first stop of each trip as the starting point. Then, it converts the LINESTRING geometries to a data.table representing a GTFS shapes table using gtfstools::convert_sf_to_shapes.

Examples

if (FALSE) { # \dontrun{
gtfs <- GTFShift::load_feed("gtfs.zip")
q <- opq("Lisbon") |>
    add_osm_feature(key = "route", value = c("bus", "tram")) |>
    add_osm_feature(key = "network", value = "Carris", key_exact = TRUE)

shapes_sf <- GTFShift::osm_shapes_to_routes(gtfs, q)

gtfs$shapes <- GTFShift::create_shapes_from_sf(shapes_sf, gtfs)
} # }