RStudio for R Statistical Computing Cookbook

Drawing a route on a map with ggmap

Working with geospatial data is a simple task with R. Thankfully, the ggmap package provides a good number of facilities for this task.

In particular, this recipe gives you the ability to draw on a map a custom defined route from one point to another.

Getting ready

As you can imagine, we first need to install and load the ggmap package:

install.packages("ggmap")
library(ggmap)

How to do it...

1. Define the route points using the route() function:

   trip      <- (route(from = "rome", to = "milan",structure = "route", output = "simple"))

2. Create the map where you want to draw the route:

   route_map <- get_map("italy",zoom = 6) 

3. Define the segment and segment_couple variables to link trip points:

   segment <- c() for(i in 1:nrow(trip)){ ...