Description
gtsf
is an R package for using GTFS data as simple
features. You can also
use it to make shapefiles and geojson from GTFS data.
Installation
You can install this package from GitHub using the devtools package:
if (!require(devtools)) {
install.packages('devtools')
}
devtools::install_github('r-gtfs/gtsf')
Example Usage
Import transit lines from the NYC Subway using trread
.
library(trread)
library(gtsf)
library(dplyr)
NYC <- import_gtfs("http://web.mta.info/developers/data/nyct/subway/google_transit.zip")
#> [1] "agency.txt" "calendar_dates.txt" "calendar.txt"
#> [4] "routes.txt" "shapes.txt" "stop_times.txt"
#> [7] "stops.txt" "transfers.txt" "trips.txt"
Get Simple Features
NYC <- gtfs_as_sf(NYC)
This adds two simple features dataframes to the list of GTFS objects: -stops_sf -routes_sf
Make Maps
These can be mapped with various libraries. For example, with the tmap package:
library(tmap)
routes_sf <- NYC$sf_routes
qtm(routes_sf)
Export (GeoJSON/Shapefile)
They can also be exported to geojson, for use elsewhere. For example:
library(sf)
st_write(NYC$sf_routes,"nyc_routes.geojson", delete_dsn = TRUE)
#> Deleting source `nyc_routes.geojson' failed
#> Writing layer `nyc_routes' to data source `nyc_routes.geojson' using driver `GeoJSON'
#> features: 25
#> fields: 1
#> geometry type: Multi Line String