Geocodes addresses on the command line and print the geo coordinates (latitude and longitude). See http://oleb.net/blog/2014/01/geocoding-automator-service/ for more info on how I am using this script.

geocode_coordinates.rb

#!/usr/bin/env ruby

# Determines the coordinates (latitude and longitude) of the places or
# addresses passed as arguments (either on the command line or via stdin)
# and prints the results.

# This script requires the Ruby Geocoder gem by Alex Reisner
# (http://www.rubygeocoder.com).
# To install the gem, run this command from a Terminal session:
#
#     sudo gem install geocoder
#
# If you are using a Ruby version manager such as rbenv or RVM, make sure
# to install the Geocoder gem in the operating system's Ruby installation
# if you use this script inside an OS X Automator action.
# For example, in rbenv, call rbenv global system before installing.

require 'geocoder'

if ARGV.count > 0
    input = ARGV
else
    input = ARGF
    input.set_encoding("utf-8") # required to handle non-ASCII characters in Automator action
end
output = ""

input.each do |address|
    trimmed_address = address.strip
    
    if trimmed_address.empty?
        output += "\n"
        next
    end
    
    geocode_result = Geocoder.search(trimmed_address)
    if geocode_result.first
        coordinates = geocode_result.first.coordinates.join(", ")
    else
        coordinates = "Not found"
    end
    output += "#{coordinates}\n"
end

puts output