osrmTable: Get Travel Time Matrices Between Points

Description

Build and send OSRM API queries to get travel time matrices between points. This function interfaces the table OSRM service.

Usage

osrmTable(loc, src = NULL, dst = NULL)

Arguments

loc

a data frame containing 3 fields: points identifiers, longitudes and latitudes (WGS84). It can also be a SpatialPointsDataFrame or a SpatialPolygonsDataFrame, then row names are used as identifiers. If loc parameter is used, all pair-wise distances are computed.

src

a data frame containing origin points identifiers, longitudes and latitudes (WGS84). It can also be a SpatialPointsDataFrame or a SpatialPolygonsDataFrame, then row names are used as identifiers. If dst and src parameters are used, only pairs between scr/dst are computed.

dst

a data frame containing destination points identifiers, longitudes and latitudes (WGS84). It can also be a SpatialPointsDataFrame or a SpatialPolygonsDataFrame, then row names are used as identifiers.

Value

A list containing 3 data frames is returned. durations is the matrix of travel times (in minutes), sources and destinations are the coordinates of the origin and destination points actually used to compute the travel times (WGS84).

Details

If loc, src or dst are data frames we assume that the 3 first columns of the data.frame are: identifiers, longitudes and latitudes.

Examples

Run this code

## Not run: 
# # Load data
# data("com")
# 
# # Inputs are data frames  
# # Travel time matrix
# distCom <- osrmTable(loc = com[1:50, c("comm_id","lon","lat")])
# # First 5 rows and columns
# distCom$durations[1:5,1:5]
# 
# # Travel time matrix with different sets of origins and destinations
# distCom2 <- osrmTable(src = com[1:10,c("comm_id","lon","lat")],
#                       dst = com[11:20,c("comm_id","lon","lat")])
# # First 5 rows and columns
# distCom2$durations[1:5,1:5]
# 
# 
# # Inputs are SpatialPointsDataFrames
# distCom <- osrmTable(loc = src)
# # First 5 rows and columns
# distCom$durations[1:5,1:5]
# 
# # Travel time matrix with different sets of origins and destinations
# distCom2 <- osrmTable(src = src, dst = dst)
# # First 5 rows and columns
# distCom2$durations[1:5,1:5]
# ## End(Not run)