berlin_gtfs: berlin_gtfs

In gtfsrouter: Routing with 'GTFS' (General Transit Feed Specification) Data

berlin_gtfs

Description

Sample GTFS data from Verkehrsverbund Berlin-Brandenburg street, reduced to U and S Bahn only (underground and overground trains), and between the hours of 12:00-13:00. Only those components of the GTFS data necessary for routing have been retained. Note that non-ASCII characters have been removed from these data, so umlauts are simply removed and eszetts become "ss". The package will nevertheless work with full GTFS feeds and non-ASCII (UTF-8) characters.

Format

A list of five data.table items necessary for routing:

• calendar

• routes

• trips

• stop_times

• stops

• transfers

Value

For single (from, to) values, a data.frame describing the route, with each row representing one stop. For multiple (from, to) values, a list of data.frames, each of which describes one route between the i'th start and end stations (from and to values). Origin and destination stations for which no route is possible return NULL.

Note

Can be re-created with the script in https://github.com/UrbanAnalyst/gtfsrouter/blob/master/data-raw/data-script.Rmd.

Examples

# Examples must be run on single thread only:
nthr_dt <- data.table::setDTthreads (1)
nthr_omp <- Sys.getenv ("OMP_THREAD_LIMIT")
Sys.setenv ("OMP_THREAD_LIMIT" = 1L)

berlin_gtfs_to_zip () # Write sample feed from Berlin, Germany to tempdir
f <- file.path (tempdir (), "vbb.zip") # name of feed
gtfs <- extract_gtfs (f)
from <- "Innsbrucker Platz" # U-bahn station, not "S"
to <- "Alexanderplatz"
start_time <- 12 * 3600 + 120 # 12:02

route <- gtfs_route (gtfs, from = from, to = to, start_time = start_time)

# Specify day of week
route <- gtfs_route (
    gtfs,
    from = from,
    to = to,
    start_time = start_time,
    day = "Sunday"
)

# specify travel by "U" = underground only
route <- gtfs_route (
    gtfs,
    from = from,
    to = to,
    start_time = start_time,
    day = "Sunday",
    route_pattern = "^U"
)
# specify travel by "S" = street-level only (not underground)
route <- gtfs_route (
    gtfs,
    from = from,
    to = to,
    start_time = start_time,
    day = "Sunday",
    route_pattern = "^S"
)

# Route queries are generally faster if the GTFS data are pre-processed with
# `gtfs_timetable()`:
gt <- gtfs_timetable (gtfs, day = "Sunday", route_pattern = "^S")
route <- gtfs_route (gt, from = from, to = to, start_time = start_time)

data.table::setDTthreads (nthr_dt)
Sys.setenv ("OMP_THREAD_LIMIT" = nthr_omp)

gtfsrouter documentation built on Sept. 24, 2023, 1:08 a.m.