I'm working with openlayers3 and I wanted to load a GeoJSON file from my local ../assets/data/countries.geojson. Nothing is wrong but it didn't appear on the screen.

This is my code:

<!doctype html>
    <title>Vector Examples</title>
    <link rel="stylesheet" href="http://openlayers.org/en/v3.13.0/css/ol.css" type="text/css">
    <script src="http://openlayers.org/en/v3.13.0/build/ol.js"></script>
    <div id="map" class="map"></div>
    <script src="../assets/ol3/js/ol.js"></script>

var originalSource=new ol.layer.Vector({
   source: new ol.source.Vector({
   projection : 'EPSG:3857',
      url: '../assets/data/countries.geojson',
      format: new ol.format.GeoJSON({

         defaultDataProjection :'EPSG:4326', 
         projection: 'EPSG:3857'


      var center = ol.proj.transform([0, 0], 'EPSG:4326', 'EPSG:3857');

      var view = new ol.View({
        center: center,
        zoom: 2

      var map = new ol.Map({
        target: 'map',
        layers: [originalSource],
        view: view
  • Why do you introduce projections here? Default behaviour should work. You can copy code from openlayers.org/en/v3.13.0/examples/vector-layer.html and change URL to your geojson file to see if it solves your issue.
    – ThomasG77
    Jan 24, 2016 at 15:53
  • You also have have a reference to OpenLayers 3 library twice e.g <script src="http://openlayers.org/en/v3.13.0/build/ol.js"></script> and <script src="../assets/ol3/js/ol.js"></script>
    – ThomasG77
    Jan 24, 2016 at 15:56
  • i already tried the example that openlayers offer when i used with chrome it gives the cross origin error and with mozilla no mistakes but still the vector won't load
    – othman
    Jan 24, 2016 at 16:03
  • To not care about cross origin error > wiki.sln.suny.edu/display/SLNKB/…
    – ThomasG77
    Jan 24, 2016 at 16:08
  • still the same problem i think the problem is in the extent when i used vectorLayer.getSource().getExtent(); it gives me [Infinity, Infinity, -Infinity, -Infinity]
    – othman
    Jan 24, 2016 at 16:12

1 Answer 1


One of the things that I did not know about when I started to use JavaScript map libraries like OpenLayers was when a file is loaded from a file system verses a web server. In my early days with OpenLayers, I would try try the OL examples and wonder why they worked on the OpenLayers site but did not work off off c:\user or /user/myid/olfiles. The rude thing that I did not understand was why say, a txt file, would work being served off a local file system but not, say, a GeoJSON example. Then I realized that you needed a webserver for some layers file types and not others. You need to have an apache webserver for the geojson/kml examples or something like http://brackets.io/ editor that allows you to run your example OpenLayers.js file from a local file system. The long story short: You cannot open a GeoJSON file with a file:// type url. You'd also have the same problems with LEAF.js.

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