mb_matrix.Rd
Retrieve a matrix of travel times from the Mapbox Directions API
The input coordinates of your request. Acceptable inputs include a list of
coordinate pair vectors in c(x, y)
format or an sf
object.
For sf linestrings or polygons, the distance between centroids will be taken.
The destination coordinates of your request. If NULL
(the default), a many-to-many matrix using origins
will be returned.
One of "driving" (the default), "driving-traffic", "walking", or "cycling".
A value expressed in kilometers per hour used to estimate travel time when a route cannot be found between locations. The returned travel time will be based on the straight-line estimate of travel between the locations at the specified fallback speed.
one of "duration"
(the default), which will be measured in either minutes or seconds (depending on the value of duration_output
), or "distance"
, which will be returned in meters.
one of "minutes"
(the default) or "seconds"
A Mapbox access token (required)
An R matrix of source-destination travel times.
if (FALSE) {
library(mapboxapi)
library(tigris)
library(mapdeck)
philly_tracts <- tracts("PA", "Philadelphia", cb = TRUE, class = "sf")
downtown_philly <- mb_geocode("Philadelphia City Hall, Philadelphia PA")
time_to_downtown <- mb_matrix(philly_tracts, downtown_philly)
philly_tracts$time <- time_to_downtown
mapdeck(style = mapdeck_style("light")) %>%
add_polygon(
data = philly_tracts,
fill_colour = "time",
fill_opacity = 0.6,
legend = TRUE
)
}