A quick and dirty script that fetches bike routes from mapzen's osrm service and converts points geom (from the input geojson) into linestrings

citibike_router.rb

#!/usr/bin/env ruby

require 'json'
require 'net/http'
require 'nokogiri'

json = File.read('citibike_in.geojson')
data = JSON.parse(json)

out = data

out['features'].each{ |f|
	pt = f['geometry']['coordinates'][0]
	src = pt[0]
	des = pt[1]
	url = "http://osrm.mapzen.com/bicycle/viaroute?loc="+src[1].to_s+"%2C"+src[0].to_s+"&loc="+des[1].to_s+"%2C"+des[0].to_s+"&output=gpx"
	resp = Net::HTTP.get_response(URI.parse(url))
	case resp
	when Net::HTTPSuccess then
		# puts "2xx"
		data = resp.body
		data = Nokogiri::XML(data)
		tt =[]
		tt.push(f['geometry']['coordinates'][0][0])
		data.css("rtept").map{|n| tt.push([n.attr("lon").to_f,n.attr("lat").to_f])}
		tt.push(f['geometry']['coordinates'][0][1])
		f['geometry']['coordinates'] = [tt]	
	when Net::HTTPClientError
		puts "4xx"
	else
		puts "no dice"
	end
}

File.open('citibike_out.geojson', 'w') do |file|
  file.write(JSON.pretty_generate(out))
end


puts JSON.pretty_generate(out)
# puts out.to_json