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    <p>When I first read your post, I misunderstand your "marker" with <a href="http://dev.openlayers.org/docs/files/OpenLayers/Marker-js.html" rel="nofollow">OpenLayers.Marker</a>, I think you'd better still call your "marker" <a href="http://dev.openlayers.org/apidocs/files/OpenLayers/Control/WMSGetFeatureInfo-js.html" rel="nofollow">WMSGetFeatureInfo</a>. It's easier for readers to follow it :)</p> <p>Personally I think the problem you get is due to your map projection, your layer projection is "ESPG:3163" when you define the parameter "lonlatfrompx", you didn't reproject lon/lat (EPSG:4326) to "ESPG:3163". So it will be wrong lon/lat for the popup...</p> <p><strong>Update</strong></p> <p>By reading your "EDIT 1" I just notice that the way you write your "var info = new OpenLayers.Control.WMSGetFeatureInfo" function is very strange, why do you need add a ajax call inside your WMSGetFeatureInfo? the usual way to do this is using "url" parameter to query the wms instead of using the ajax call. for example: </p> <pre><code>info = new OpenLayers.Control.WMSGetFeatureInfo({ url: 'http://demo.opengeo.org/geoserver/wms', title: 'Identify features by clicking', queryVisible: true, layers: [layer], eventListeners: { getfeatureinfo: function(event) { // add popup here map.addPopup(new OpenLayers.Popup.FramedCloud( "chicken", map.getLonLatFromPixel(event.xy), null, event.text, null, true )); }, beforegetfeatureinfo: function(event) { ...... }, nogetfeatureinfo: function(event) { ...... } ...... } }); </code></pre> <p><strong>update 2</strong></p> <p>First: </p> <p>Yes, the WMSGetFeatureInfo will send multiple requests to WMS server if you include multiple source (layers). that's why your ajax called multiple times.</p> <p>Do all layers on the same map position (mouse click point) have the same id (idGeoEad)? if they do, there is a quick and dirty way which is only providing the "layers" parameter one layer (instead of array of layers), then the ajax call will only trigger one time. Or just don't set the layer &amp; url parameters, it will find the first eligible layer itself.</p> <p>Second: </p> <p>Even if that's the case, in my opinion it should not affect your popup position. Because "event.xy" and "lonlatfrompx" should always the same. So I think the popup is pointing far away from the related marker is still caused by wrong projection. So please double check your map projection, map display projection and all layers' projection. Also please check if all your layers' projection on your mapfile setting correct? Does all the layers use "EPSG:3163" ? In your code above I notice that a typo "srs : 'ESPG:3163'", it should be EPSG:3163. </p> <p>If you use fire-bug or google developer tool, please debug or console.log to see if "event.xy" and "lonlatfrompx" will get the correct position every time.</p>
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    1. POOpenLayers : Multiple layers popup issue
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    1. COThanks for your anwser. That's interesting. However, since I'm newbie to Openlayer, what can I do then? I edited my post after try another things but still no success :(. Thanks
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    2. COplz see my update
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    3. COHi, thanks for the update. I'm using ajax because the url is different from the WMS server `/cartoweb/FicheTheme?idGeoEad=`. The actual system is not based on the server to retreive data so I need to query a specific URL containing an ID in order to get back the information related to a marker. A weird behavior I noticed is that if there is for example 3 layers on the map, the `eventListeners : getfeatureinfo` is executed 3 times, and sometimes return mulitple values. At that moment is seems to break. I've try to use `drillDown` but still not working :(. Thoughts?
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