otp_isochrone: Get the Isochrones from a location

Description

Get the Isochrones from a location

Usage

otp_isochrone(
  otpcon = NA,
  fromPlace = NA,
  fromID = NULL,
  mode = "CAR",
  date_time = Sys.time(),
  arriveBy = FALSE,
  maxWalkDistance = 1000,
  routingOptions = NULL,
  cutoffSec = c(600, 1200, 1800, 2400, 3000, 3600),
  ncores = max(round(parallel::detectCores() * 1.25) - 1, 1),
  timezone = otpcon$timezone
)

Value

Returns a SF data.frame of POLYGONs

Arguments

otpcon: OTP connection object produced by otp_connect()
fromPlace: Numeric vector, Longitude/Latitude pair, e.g. `c(-0.134649,51.529258)`, or 2 column matrix of Longitude/Latitude pairs, or sf data frame of POINTS
fromID: character vector same length as fromPlace
mode: character vector of one or more modes of travel valid values TRANSIT, WALK, BICYCLE, CAR, BUS, RAIL, SUBWAY, TRAM, FERRY, BICYCLE_RENT, BICYCLE_PARK, CAR_PARK, CABLE_CAR, GONDOLA, FUNICULAR, AIRPLANE, default CAR. Not all combinations are valid e.g. c("WALK","BUS") is valid but c("WALK","CAR") is not.
date_time: POSIXct, a date and time, defaults to current date and time
arriveBy: Logical, Whether the trip should depart or arrive at the specified date and time, default FALSE
maxWalkDistance: maximum distance to walk in metres
routingOptions: named list passed to OTP see `otp_routing_options()`
cutoffSec: Numeric vector, number of seconds to define the break points of each Isochrone
ncores: number of cores to use in parallel processing
timezone: character, timezone to use, default from otpcon

Details

Isochrones are maps of equal travel time, for a given location a map is produced showing how long it takes to reach each location.

Isochrones are only available from OTP v1.x and will not work with v2.0

Examples

Run this code

if (FALSE) {
isochrone1 <- otp_isochrone(otpcon, fromPlace = c(-0.1346, 51.5292))
isochrone2 <- otp_isochrone(otpcon,
  fromPlace = c(-0.1346, 51.5292),
  mode = c("WALK", "TRANSIT"), cutoffSec = c(600, 1200, 1800)
)
}