country.rb in earth-0.7.0

- old
+ new

@@ -1,19 +1,31 @@
 class Country < ActiveRecord::Base
   set_primary_key :iso_3166_code
   
+  has_many :rail_companies, :foreign_key => 'country_iso_3166_code'
+  
   falls_back_on :name => 'fallback',
-                :automobile_urbanity => lambda { Country.united_states.automobile_urbanity }, # for now assume US represents world
+                :automobile_urbanity => lambda { united_states.automobile_urbanity }, # for now assume US represents world
                 :automobile_fuel_efficiency => ((22.5 + 16.2) / 2.0).miles_per_gallon.to(:kilometres_per_litre), # average of passenger car fuel unknown and light goods vehicle fuel unknown - WRI Mobile Combustion calculation tool v2.0
                 :automobile_fuel_efficiency_units => 'kilometres_per_litre',
-                :automobile_city_speed => lambda { Country.united_states.automobile_city_speed }, # for now assume US represents world
-                :automobile_city_speed_units => lambda { Country.united_states.automobile_city_speed_units }, # for now assume US represents world
-                :automobile_highway_speed => lambda { Country.united_states.automobile_highway_speed }, # for now assume US represents world
-                :automobile_highway_speed_units => lambda { Country.united_states.automobile_highway_speed_units }, # for now assume US represents world
-                :automobile_trip_distance => lambda { Country.united_states.automobile_trip_distance }, # for now assume US represents world
-                :automobile_trip_distance_units => lambda { Country.united_states.automobile_trip_distance_units }, # for now assume US represents world
-                :flight_route_inefficiency_factor => lambda { Country.maximum(:flight_route_inefficiency_factor) } # default to the largest inefficiency factor
+                :automobile_city_speed => lambda { united_states.automobile_city_speed }, # for now assume US represents world
+                :automobile_city_speed_units => lambda { united_states.automobile_city_speed_units }, # for now assume US represents world
+                :automobile_highway_speed => lambda { united_states.automobile_highway_speed }, # for now assume US represents world
+                :automobile_highway_speed_units => lambda { united_states.automobile_highway_speed_units }, # for now assume US represents world
+                :automobile_trip_distance => lambda { united_states.automobile_trip_distance }, # for now assume US represents world
+                :automobile_trip_distance_units => lambda { united_states.automobile_trip_distance_units }, # for now assume US represents world
+                :flight_route_inefficiency_factor => lambda { maximum(:flight_route_inefficiency_factor) }, # default to the largest inefficiency factor
+                :rail_trip_distance => lambda { weighted_average(:rail_trip_distance, :weighted_by => :rail_passengers) },
+                :rail_trip_distance_units => 'kilometres', # FIXME TODO derive this
+                :rail_speed => lambda { weighted_average(:rail_speed, :weighted_by => :rail_passengers) },
+                :rail_speed_units => 'kilometres_per_hour', # FIXME TODO derive this
+                :rail_trip_electricity_intensity => lambda { weighted_average(:rail_trip_electricity_intensity, :weighted_by => :rail_passengers) },
+                :rail_trip_electricity_intensity_units => 'kilowatt_hour_per_passenger_kilometre', # FIXME TODO derive this
+                :rail_trip_diesel_intensity => lambda { weighted_average(:rail_trip_diesel_intensity, :weighted_by => :rail_passengers) },
+                :rail_trip_diesel_intensity_units => 'litres_per_passenger_kilometre', # FIXME TODO derive this
+                :rail_trip_co2_emission_factor => lambda { weighted_average(:rail_trip_co2_emission_factor, :weighted_by => :rail_passengers) },
+                :rail_trip_co2_emission_factor_units => 'kilograms' # FIXME TODO derive this
   
   class << self
     def united_states
       find_by_iso_3166_code('US')
     end
@@ -29,6 +41,17 @@
   col :automobile_highway_speed, :type => :float
   col :automobile_highway_speed_units
   col :automobile_trip_distance, :type => :float
   col :automobile_trip_distance_units
   col :flight_route_inefficiency_factor, :type => :float
-end
\ No newline at end of file
+  col :rail_passengers, :type => :float
+  col :rail_trip_distance, :type => :float
+  col :rail_trip_distance_units
+  col :rail_speed, :type => :float
+  col :rail_speed_units
+  col :rail_trip_electricity_intensity, :type => :float
+  col :rail_trip_electricity_intensity_units
+  col :rail_trip_diesel_intensity, :type => :float
+  col :rail_trip_diesel_intensity_units
+  col :rail_trip_co2_emission_factor, :type => :float
+  col :rail_trip_co2_emission_factor_units
+end