Fix comparing two locations.

lib/geospatial/location.rb

@@ -87,10 +87,20 @@ def to_ary
 			to_a
 		end
 
+		def to_h
+			{latitude: @latitude, longitude: @longitude}
+		end
+
 		def to_s
 			"#{self.class}[#{self.longitude.to_f}, #{self.latitude.to_f}]"
 		end
 
+		include Comparable
+
+		def <=> other
+			to_a <=> other.to_a
+		end
+
 		alias inspect to_s
 
 		attr :longitude # -180 -> 180 (equivalent to x)

spec/geospatial/location_spec.rb

@@ -32,6 +32,11 @@
 		it "should format nicely" do
 			expect("#{lake_alex}").to be == "Geospatial::Location[170.45, -43.94]"
 		end
+
+		it "should have equivalence" do
+			expect(lake_tekapo).to be == lake_tekapo
+			expect(lake_alex).to_not be == lake_tekapo
+		end
 	end
 
 	context 'points on equator' do