Geolocation API as AngularJS service

geolocation.js

angular.module('app', [])

.factory('$geolocation', function($q) {
  return {
    get: function() {
      var deferred = $q.defer();

      navigator.geolocation.getCurrentPosition(
        function(result) {
          deferred.resolve(result);
        },
        function(error) {
          deferred.reject(error);
        }
      );

      return deferred.promise;          
    },

    watch: function() {
      var deferred = $q.defer();

      navigator.geolocation.watchPosition(
        function(result) {
          deferred.notify(result);
        },
        function(error) {
          deferred.reject(error);
        }
      );

      return deferred.promise;
    }
  };
})

.controller('PositionController', function($scope, $geolocation) {
  $geolocation.watch().then(
    function() {},
    function(error) {
      // Something bad happened.
    },
    function(position) {
      console.log(position);
      $scope.position = position;
    }
  );
});