gtfstools (version 1.4.0)

convert_shapes_to_sf: Convert shapes table to simple feature object

Description

Converts the shapes table to a LINESTRING sf object.

Usage

convert_shapes_to_sf(gtfs, shape_id = NULL, crs = 4326, sort_sequence = FALSE)

Value

A LINESTRING sf object.

Arguments

gtfs

A GTFS object, as created by read_gtfs().

shape_id

A character vector including the shape_ids to be converted. If NULL (the default), all shapes are converted.

crs

The CRS of the resulting object, either as an EPSG code or as an crs object. Defaults to 4326 (WGS 84).

sort_sequence

A logical. Whether to sort shapes by shape_pt_sequence. Defaults to FALSE, otherwise spec-compliant feeds, in which shape points are already ordered by shape_pt_sequence, would be penalized through longer processing times. Shapes generated from unordered sequences do not correctly depict the real life trip shapes.

Examples

# \dontshow{
  old_dt_threads <- data.table::setDTthreads(1)
  on.exit(data.table::setDTthreads(old_dt_threads), add = TRUE)
# }
# read gtfs
data_path <- system.file("extdata/spo_gtfs.zip", package = "gtfstools")
gtfs <- read_gtfs(data_path)

shapes_sf <- convert_shapes_to_sf(gtfs)
head(shapes_sf)

shapes_sf <- convert_shapes_to_sf(gtfs, shape_id = "17846")
shapes_sf