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</o:shapelayout></xml><![endif]--></head><body lang=IT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello everyone!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I'm quite new to OpenLayers, and completely new to WMS querying. I’m needing some help here.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I have to query values of a WMS hosted by Geoserver from a GeoTiff file. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>What is the best way? Following the examples I found on the web (i.e. http://dev.openlayers.org/releases/OpenLayers-2.13.1/examples/getfeatureinfo-control.html), I tried to perform a WMSGetFeatureInfo like follows:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>function initialize(){<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>var resolutions = OpenLayers.Layer.Bing.prototype.serverResolutions.slice(MYMIN, MYMAX);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>var layer_BNI = new OpenLayers.Layer.WMS("MY TITLE",<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> "http://localhost:8080/geoserver/wms",<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> { 'layers': 'MYLAYER', transparent: true, format: 'image/png' },<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> { isBaseLayer: false }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> );<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>var map = new OpenLayers.Map({<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>div: MYDIV,<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>theme: null,<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>projection: "EPSG:900913",<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>layers: [<o:p></o:p></span></p><p class=MsoNormal style='margin-left:35.4pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>layer_BNI,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:35.4pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>new OpenLayers.Layer.OSM("MapQuest-OSM Tiles", arrayOSM, {<o:p></o:p></span></p><p class=MsoNormal style='margin-left:70.8pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>attribution: "<p>Data, imagery and map information provided by <a href='http://www.mapquest.com/' target='_blank'>MapQuest</a>, <a href='http://www.openstreetmap.org/' target='_blank'>Open Street Map</a> and contributors, <a href='http://creativecommons.org/licenses/by-sa/2.0/' target='_blank'>CC-BY-SA</a> <img src='http://developer.mapquest.com/content/osm/mq_logo.png' border='0'></p>",<o:p></o:p></span></p><p class=MsoNormal style='margin-left:70.8pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>transitionEffect: "resize", <o:p></o:p></span></p><p class=MsoNormal style='margin-left:70.8pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>zoomOffset: MYMIN,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> resolutions: resolutions<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> })<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>],<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>controls: [<o:p></o:p></span></p><p class=MsoNormal style='margin-left:35.4pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>new OpenLayers.Control.Attribution(),<o:p></o:p></span></p><p class=MsoNormal style='margin-left:35.4pt;text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>new OpenLayers.Control.Navigation()<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>],<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>center: [0, 0],<o:p></o:p></span></p><p class=MsoNormal style='text-indent:35.4pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>zoom: MYZOOM<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>});<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>var info = new OpenLayers.Control.WMSGetFeatureInfo({<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> url: 'http://localhost:8080/geoserver/wms',<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> title: 'Identify features by clicking',<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> layers: [layer_BNI],<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> eventListeners: {<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> getfeatureinfo: getInfo<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> },<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> queryVisible: true<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> });<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>map.addControl(info);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>info.activate();<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>function getInfo(event) {<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>//event is always empty<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>}<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>My layers are loaded and shown correctly, getInfo is fired correctly, but event.text is ALWAYS an empty string.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>With QGIS values are extracted correctly from my WMS, so I guess the issue is not WMS-side but client-side.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>What am I doing wrong?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>Thank you very much!<o:p></o:p></p></div></body></html>