mp_matrix function

Get distance matrix from the Google Maps Distance Matrix API

mp_matrix(
  origins,
  destinations,
  mode = c("driving", "transit", "walking", "bicycling"),
  arrival_time = NULL,
  departure_time = NULL,
  avoid = c(NA, "tolls", "highways", "ferries", "indoor"),
  region = NULL,
  traffic_model = c("best_guess", "pessimistic", "optimistic"),
  transit_mode = c("bus", "subway", "train", "tram"),
  key,
  quiet = FALSE
)

Arguments

• origins: Origins, as

  • character vector with addresses to be geocoded
  • numeric vector of length two (lon, lat)
  • matrix with two columns (lon, lat)
  • sf or sfc point layer

• destinations: Destinations, in one of the same formats as for origins

• mode: Travel mode, one of: "driving", "transit", "walking", "bicycling"

• arrival_time: The desired time of arrival for transit directions, as POSIXct

• departure_time: The desired time of departure, as POSIXct

• avoid: NA (default) or one of: "tolls", "highways", "ferries" or "indoor"

• region: The region code, specified as a ccTLD ("top-level domain") two-character value (e.g. "es" for Spain) (optional)

• traffic_model: The traffic model, one of: "best_guess" (the default), "pessimistic", "optimistic". The traffic_model parameter is only taken into account when departure_time is specified!

• transit_mode: Transit preferred mode, one or more of: "bus", "subway", "train" or "tram"

• key: Google APIs key

• quiet: Logical; suppress printing URL for Google Maps API call (e.g. to hide API key)

Returns

XML document with Google Maps Distance Matrix API response

Note

Use function mp_get_matrix to extract distance and duration matrix objects

Examples

# Built-in reponse example
library(xml2)
doc = as_xml_document(response_matrix)

## Not run:

# Text file with API key
key = readLines("~/key")

# Using 'data.frame' input
doc = mp_matrix(
  origins = rbind(c(34.811, 31.892), c(35.212, 31.769)),
  destinations = c(34.781, 32.085),
  key = key
)

# Using 'character' input
locations = c("Tel-Aviv", "Jerusalem", "Beer-Sheva", "Eilat")
doc = mp_matrix(
  origins = locations,
  destinations = locations,
  key = key
)

# Setting transit modes
locations = c("Tel-Aviv", "Beer-Sheva", "Eilat")
doc = mp_matrix(
  origins = locations,
  destinations = locations,
  key = key,
  mode = "transit",
  transit_mode = "train"
)
## End(Not run)

References

https://developers.google.com/maps/documentation/distance-matrix/overview