javascript - Uncaught TypeError: Cannot read property 'latitude' of undefined - Stack Overflow

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Hi all I have the following code:

  var map;
  var infowindow;


  function getLocation()
    {
    if (navigator.geolocation)
      {
      navigator.geolocation.getCurrentPosition(initialize);
      }
    else{x.innerHTML="Geolocation is not supported by this browser.";}
    }

  function initialize(position) {
    var pyrmont = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);

    map = new google.maps.Map(document.getElementById('map'), {
      mapTypeId: google.maps.MapTypeId.ROADMAP,
      center: pyrmont,
      zoom: 15
    });

    var request = {
      location: pyrmont,
      radius: 500,
      types: ['restaurant']
    };
 ...

Basically I can get the map to work great if I set the Long/Lat co-ordinates but instead I want these to be passed by getting the users location. With the code above the map is displaying on my phone but with the following error:

TypeError: 'undefined' is not an object (evaluating 'position.coords.latitude')

but on the desktop I get no map and the following error:

   Uncaught TypeError: Cannot read property 'latitude' of undefined 

Any help would be great I'm a newbie to Javascript and these APis

Hi all I have the following code:

  var map;
  var infowindow;


  function getLocation()
    {
    if (navigator.geolocation)
      {
      navigator.geolocation.getCurrentPosition(initialize);
      }
    else{x.innerHTML="Geolocation is not supported by this browser.";}
    }

  function initialize(position) {
    var pyrmont = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);

    map = new google.maps.Map(document.getElementById('map'), {
      mapTypeId: google.maps.MapTypeId.ROADMAP,
      center: pyrmont,
      zoom: 15
    });

    var request = {
      location: pyrmont,
      radius: 500,
      types: ['restaurant']
    };
 ...

Basically I can get the map to work great if I set the Long/Lat co-ordinates but instead I want these to be passed by getting the users location. With the code above the map is displaying on my phone but with the following error:

TypeError: 'undefined' is not an object (evaluating 'position.coords.latitude')

but on the desktop I get no map and the following error:

   Uncaught TypeError: Cannot read property 'latitude' of undefined 

Any help would be great I'm a newbie to Javascript and these APis

• javascript
• html
• google-maps
• google-maps-api-3
• geolocation

Share Improve this question Follow edited Jan 8, 2013 at 18:11 Mark H asked Jan 8, 2013 at 16:56 Mark HMark H 58922 gold badges1111 silver badges2121 bronze badges 2

• Does this answer help -> stackoverflow./a/3885172/572939 - talks about adding a timeout to ensure the failurecallback is called (which you havent implemented BTW) – Manse Commented Jan 8, 2013 at 17:02
• Hiya I am still getting the error but the map shows on my phone but not on the desktop. You can see it in action at: http://markhaynes.me/mwp/addloc.html – Mark H Commented Jan 8, 2013 at 18:12

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 5

Later in your code, on your page at http://markhaynes.me/mwp/addloc.html, you're calling google.maps.event.addDomListener(window, 'load', initialize);

This causes Google to call the initialize() function, but it passes an event object as the position parameter instead of the position object you expected.

Well it's not an issue with the geolocation API. Here's a JSFIDDLE of geolocation: http://jsfiddle/w4nvZ/3/

There's also the documentation and examples for the API here: http://www.w3schools./html/html5_geolocation.asp

Google even has an example of geolocation working with the JavaScript Google Maps API: https://google-developers.appspot./maps/documentation/javascript/examples/map-geolocation

 var map;
function initialize() {
var mapOptions = {
zoom: 6,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
// Try HTML5 geolocation
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
var infowindow = new google.maps.InfoWindow({
map: map,
position: pos,
content: 'Location found using HTML5.'
});
map.setCenter(pos);
}, function() {
handleNoGeolocation(true);
});
} else {
// Browser doesn't support Geolocation
handleNoGeolocation(false);
}
}
function handleNoGeolocation(errorFlag) {
if (errorFlag) {
var content = 'Error: The Geolocation service failed.';
} else {
var content = 'Error: Your browser doesn\'t support geolocation.';
}
var options = {
map: map,
position: new google.maps.LatLng(60, 105),
content: content
};
var infowindow = new google.maps.InfoWindow(options);
map.setCenter(options.position);
}
google.maps.event.addDomListener(window, 'load', initialize); 

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