I'm having trouble with a select feature example in GeoServer and OpenLayers. For some reason the request returns nothing.

Here's the stripped down version that produces this:

I have a small WMS layer(~100 parcels) with polygons, and address data that I am overlaying Google Maps with a projection. It displays correctly.

map = map(...); //standard map creation
gmap = ...; // standard street map creation
wmslayer = new OpenLayers.Layer.WMS(
            {'layers': 'test:parcel', 'format':'image/png', 'transparent':'true'},
            {'opacity': 0.5, 'isBaseLayer': false, 'visibility' : false, 'zoomMin' : 15}

Then I create the click control...

infoControls = 
            click: new OpenLayers.Control.WMSGetFeatureInfo
                url: '', 
                title: 'Get parcel data',
                layers: [wmslayer],
                queryVisible: true

Added the layers, add the control and activate it

map.addLayers([gmap, wmslayer]);  
infoControls[0].events.register("getfeatureinfo", this, showInfo);

//show info callback
function showInfo(evt) {    

But when I click on the map inside I parcel, it gives the alert is blank, and so is the features in Firebug (from console.log(evt)).

The GET request in Firebug is red.

BBOX    -10845148.716676,5165071.048543,-10843335.725912,5166002.624825
FORMAT  image/png
INFO_FORMAT text/html
LAYERS  test:parcel
QUERY_LAYERS    test:parcel
REQUEST GetFeatureInfo
SRS EPSG:900913
WIDTH   759
X   582
Y   246

Edit: The database is CRS is EPSG:4327 and projecting it to Google Mercator... Do I need to project the BBOX of the request back to EPSG:4327 before I send the WMS request? How can I do this?

Here is the GeoServer log of the request

2011-07-22 14:49:01,301 INFO [geoserver.wms] - 
Request: getFeatureInfo
    GetMapRequest = 
GetMap Request
 version: 1.1.1
 output format: image/png
 width height: 759,390
 bbox: ReferencedEnvelope[-1.0845637448332E7 : -1.0842011466804E7, 5164278.964868 : 5166142.117432]
 layers: test:parcel
 styles: polygon
    QueryLayers = [org.geoserver.wms.MapLayerInfo@a837896f]
    XPixel = 385
    YPixel = 144
    FeatureCount = 10
    InfoFormat = text/html
    Exceptions = application/vnd.ogc.se_xml
    Version = 1.1.1
    Request = GetFeatureInfo
    BaseUrl =
    Get = false
    RawKvp = {INFO_FORMAT=text/html, BBOX=-10845637.448332,5164278.964868,-10842011.466804,5166142.117432, QUERY_LAYERS=test:parcel, SERVICE=WMS, HEIGHT=390, REQUEST=GetFeatureInfo, STYLES=, WIDTH=759, FEATURE_COUNT=10, VERSION=1.1.1, FORMAT=image/png, LAYERS=test:parcel, Y=144, X=385, SRS=EPSG:900913}
    RequestCharset = null
  • You made sure WMS is enabled on your geoserver?
    – CaptDragon
    Commented Jul 22, 2011 at 16:31
  • Can you post firebugs response? or is it not present?
    – CaptDragon
    Commented Jul 22, 2011 at 16:32
  • @capdragon Hello! Yes WMS is enabled. The response section is blank.
    – Nate
    Commented Jul 22, 2011 at 16:46
  • 2
    is the page served from the same address as your geoserver? if not you'll need a proxy
    – Ian Turton
    Commented Jul 22, 2011 at 17:47
  • 1
    if the ports are different then you need a proxy or to relay the tomcat/geoserver through apache see ian01.geog.psu.edu/geoserver_docs/software/java.html
    – Ian Turton
    Commented Jul 23, 2011 at 10:04

1 Answer 1


So mostly for future readers of this question - when you are doing getFeatureInfo requests to a different server (which includes a difference in the port number) you need a proxy - see http://trac.osgeo.org/openlayers/wiki/FrequentlyAskedQuestions#ProxyHost for more discussion.


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