[Geoserver-users] Get feature Info for multiple layers

GeoServer GeoServer User
1

I assume this is a simple fix, but I can’t seem to get it right. The ‘GetFeatureInfo’ request works fine with one layer, but I am unable to get it working for all layers in the map. The relevant parts of code are shown below.

// For WMS layer and for GetFeatureInfo
var wmsurl = “http://localhost:8080/geoserver/wms”;

// setup tiled layer
var Primary = new OpenLayers.Layer.WMS(
“Primary Schools”, “http://localhost:8080/geoserver/wms”,
{‘layers’: ‘prototype:Primary’, ‘format’:‘image/png’, ‘transparent’:‘true’},
{‘opacity’: 1.0, ‘isBaseLayer’: false, ‘visibility’: false}

);

);
// Tie click event to WMS GetFeatureInfo call
map.events.register(‘click’, map, function (e) {
var url = wmsurl
+ “?REQUEST=GetFeatureInfo”
+ “&EXCEPTIONS=application/vnd.ogc.se_xml”
+ “&BBOX=” + map.getExtent().toBBOX()
+ “&X=” + e.xy.x
+ “&Y=” + e.xy.y
+ “&INFO_FORMAT=text/html”
+ “&QUERY_LAYERS=prototype:Primary”
+ “&LAYERS=prototype:Primary”
+ “&FEATURE_COUNT=33”
+ “&SRS=EPSG:4326”
+ “&STYLES=”
+ “&WIDTH=” + map.size.w
+ “&HEIGHT=” + map.size.h;
window.open(url,
“getfeatureinfo”,
“location=0,status=0,scrollbars=1,width=600,height=150”
);
});
2

This code looks fine for a single layer. When you modify it to deal
with multiple layers, make sure to update both the LAYERS and
QUERY_LAYERS fields of the WMS GetFeatureInfo request.

You might also want to look into using the WMSGetFeatureInfo control
provided by OpenLayers instead of constructing the URL yourself. An
example is available here:
http://openlayers.org/dev/examples/getfeatureinfo-control.html

Hope this helps.

--
David Winslow
OpenGeo - http://opengeo.org/

On Tue, 2009-09-08 at 10:11 +0000, fsenyah@anonymised.com wrote:

I assume this is a simple fix, but I can't seem to get it right. The
'GetFeatureInfo' request works fine with one layer, but I am unable to
get it working for all layers in the map. The relevant parts of code
are shown below.

// For WMS layer and for GetFeatureInfo
        var wmsurl = "http://localhost:8080/geoserver/wms";
  
   // setup tiled layer
                var Primary = new OpenLayers.Layer.WMS(
                    "Primary Schools",
"http://localhost:8080/geoserver/wms",
                    {'layers': 'prototype:Primary',
'format':'image/png', 'transparent':'true'},
           {'opacity': 1.0, 'isBaseLayer': false, 'visibility': false}
                         
                );

);
  // Tie click event to WMS GetFeatureInfo call
map.events.register('click', map, function (e) {
    var url = wmsurl
      + "?REQUEST=GetFeatureInfo"
      + "&EXCEPTIONS=application/vnd.ogc.se_xml"
      + "&BBOX=" + map.getExtent().toBBOX()
      + "&X=" + e.xy.x
      + "&Y=" + e.xy.y
      + "&INFO_FORMAT=text/html"
      + "&QUERY_LAYERS=prototype:Primary"
      + "&LAYERS=prototype:Primary"
      + "&FEATURE_COUNT=33"
      + "&SRS=EPSG:4326"
      + "&STYLES="
      + "&WIDTH=" + map.size.w
      + "&HEIGHT=" + map.size.h;
    window.open(url,
      "getfeatureinfo",
      "location=0,status=0,scrollbars=1,width=600,height=150"
    );
  });

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