GTFS-to-GEOJSON.md

Ruby script to convert stops.txt and shapes.txt to GeoJSON.

shapes.rb

require 'csv'
require 'json'

# TODO: scripts expects shape_id and shape_pt_sequence to be in order in file
# e.g. all points of single shape together, and shape_pt_sequence increasing

features = []

coordinates = []
shape_id = nil 
CSV.foreach('shapes.txt', headers: true) do |row|  
  if row['shape_id'] != shape_id
    # new shape!    
    if shape_id
      features << {
        type: 'Feature',
        properties: {},
        geometry: {
          type: 'LineString',
          coordinates: coordinates
        }
      }
    end    
    coordinates = []
    shape_id = row['shape_id']
  end

  coordinates << [row['shape_pt_lon'].to_f, row['shape_pt_lat'].to_f]
end

File.open('shapes.json', 'w') do |f|
  f.write(JSON.pretty_generate({type: 'FeatureCollection', features: features}))
end

stops.rb

require 'csv'
require 'json'

features = []

CSV.foreach('stops.txt', headers: true) do |row|
  features << {
    type: 'Feature',
    properties: {
      name: row['stop_name']
    },
    geometry: {
      type: 'Point',
      coordinates: [row['stop_lon'].to_f, row['stop_lat'].to_f]
    }
  }
end

File.open('stops.json', 'w') do |f|
  f.write(JSON.pretty_generate({type: 'FeatureCollection', features: features}))
end