I am trying to include a mapserver WMS in Openlayers-3 using custom projection without proj4j.js, according to this. I have no image, no error message and Openlayers is getting mapserver .map according to debug tools, window network. enter image description here I suppose a problem of projection (?) but can't identify it.

<!doctype html>
 <html lang="en">
      #map {
        height: 256px;
        width: 512px;
  .ol-attribution a{
    color: black;
<script src="http://openlayers.org/en/v3.17.1/build/ol.js" type="text/javascript"></script> 
<title>OpenLayers 3</title>
<div id="map"></div>
<script type="text/javascript"> 
  var map = new ol.Map({
    target: 'map',
    layers: [
      new ol.layer.Image({
        title: 'operations Inrap',
        source: new ol.source.ImageWMS({
          url: '\OSGeo4W\apache\htdocs\fond_mapserver.map',
          params: {'LAYERS': 'Interrégions',
                    //'CRS': 'EPSG:2154',
                    'FORMAT': 'image/jpeg'},
          serverType: 'mapserver',
          extent: [93501.1, 6044342.00, 1248133.25, 7115784.50]
    view: new ol.View({
      projection: new ol.proj.Projection({
      units: 'm'
      center: [681845, 6606361],
     controls: ol.control.defaults({
        attributionOptions: {
            collapsible: true


try to declare your projection and add it to the ol namespace

   var projection = new ol.proj.Projection({
    code: 'EPSG:2154',
    extent: [-378305.81,6093283.21, 1212610.74,7186901.68],
    units: 'm'

Then asign this projection to your view

view: new ol.View({
      projection: projection,
  • I just tried this way but get neither error message nor image. I can't see the difference between my code and the one I put in link :'(... – Leehan Aug 25 '16 at 7:28
  • the only diff is -->ol.proj.addProjection(projection); check this example -->openlayers.org/en/latest/examples/… – pavlos Aug 25 '16 at 8:17
  • Yes I saw that in this example and in the lines you wrote. And I have tested it unsuccessfully. In this link : openlayersbook.github.io/… it seems so "easy", but something is wrong in my code...Thx anw – Leehan Aug 25 '16 at 8:30
  • The example you refernce is based on a very old version of ol3. Better stick with the latest ol3 official examples as many changes on the projection's functionality has been made – pavlos Aug 25 '16 at 10:08
  • I have a doubt : the request sent to mapserver by openlayers begins with : &... I can't see the "/" between C: and OSGeo4W for example, neither the others ??! – Leehan Aug 25 '16 at 12:21

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