Angular Geo Location Snippet

MainController.js

var app = angular.module('app', []);

app.factory('geoLoc', ['$q', '$window', function ($q, $window) {

  'use strict';

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

      if (!$window.navigator.geolocation) {
        deferred.reject('Geolocation not supported.');
      } else {
        $window.navigator.geolocation.getCurrentPosition(
          function (position) {
            deferred.resolve(position);
          },
          function (err) {
            deferred.reject(err);
          }
        );
      }

      return deferred.promise;
    }
  };
}]);

app.factory('geoDistance', function () {

  'use strict';

  var deg2rad = function(deg) {
    return deg * (Math.PI/180)
  }

  return {
    miles: function(lat1,lon1,lat2,lon2) {
      var R = 3961; // Radius of the earth in miles
      var dLat = deg2rad(lat2-lat1);  // deg2rad below
      var dLon = deg2rad(lon2-lon1); 
      var a = 
        Math.sin(dLat/2) * Math.sin(dLat/2) +
        Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 
        Math.sin(dLon/2) * Math.sin(dLon/2)
        ;
      var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
      var d = R * c; // Distance in miles
      return d;
    }
  };
});

app.controller('Controller', 
function(geoLoc, geoDistance, $http, $interval, $scope) {

  var self = this;
  self.errorMessage = null;
  self.loading = false;

  var round = function(x) {
    return Math.round(x*100)/100;
  };

  self.getTime = function(distance) {
    var mph = 3.1;
    return round(distance / mph * 60) * 1.2;
  }

  self.getLocation = function(position) {
    var lat2 = 28.5492468;
    var lon2 = -81.3545004;

    self.loading = true;
    geoLoc.currentPosition().then(function(pos) {
      console.log(pos);
      var lat1 = pos.coords.latitude;
      var lon1 = pos.coords.longitude;

      self.distance = round(geoDistance.miles(lat1, lon1, lat2, lon2));
      self.loading = false;
    });

  };

});