I'm using the following code to get my WMS layers through GeoExt's WMSCapabilities store and display them in a grid for the users to select and add them to the map panel. but i need to add also a base layer but i couldn't succeed.

 Ext.onReady(function() {
        app = new Ext.Viewport({
            layout: "border",
            items: items
    var map = new OpenLayers.Map(null, {
          projection: new OpenLayers.Projection("EPSG:3857"),
          allOverlays: true,
          maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34,
                                 20037508.34, 20037508.34),
          units: 'm',
          numZoomLevels: 10
        xtype: "gx_mappanel",
        ref: "mapPanel",
        region: "center",
        map: map
        new OpenLayers.Control.Navigation(),
        new OpenLayers.Control.Attribution(),
        new OpenLayers.Control.PanPanel(),
        new OpenLayers.Control.ZoomPanel()
        xtype: "grid",
        ref: "capsGrid", // makes the grid available as app.capsGrid
        title: "Request/Status Map Layers",
        region: "north",
        height: 150,
        viewConfig: {forceFit: true},
        store: new GeoExt.data.WMSCapabilitiesStore({
            url: "data/getcap_1.3.0.xml",
            autoLoad: true
        columns: [
            {header: "Name", dataIndex: "name", sortable: true},
            {header: "Title", dataIndex: "title", sortable: true},
            {header: "Abstract", dataIndex: "abstract"}
        bbar: [{
            text: "Add to Map",
            handler: function() {
                app.capsGrid.getSelectionModel().each(function(record) {
                    var clone = record.clone();
                    bbox = clone.get("llbbox");
                        format: "image/png",
                        transparent: true
                    var osmLayer = new OpenLayers.Layer.OSM();
                        OpenLayers.Bounds.fromArray(clone.get("llbbox")).transform(new OpenLayers.Projection("EPSG:4326"), new OpenLayers.Projection("EPSG:3857"))



You will have to request your layer in the correct srs and transform the bbox you grabbed from the clone variable

  • Thank you, but that is what i have already did. – user30839 Jan 22 '15 at 17:51
  • Can you explain what exactly does not work? – Thomas B Jan 22 '15 at 17:52
  • 1
    So this means your problem is solved? Or did you want to add the osm-layer dynamically? – Thomas B Jan 22 '15 at 18:43
  • 1
    Yes, for example with a second button-object in the bbar-array where you just use your two lines of code to add the osm-layer as handler function.But to have a default baselayer is probably also nice, isn't it? – Thomas B Jan 22 '15 at 18:54
  • 1
    Yes, just copy the object to something like bbar=[ { ... },{ ...}]; – Thomas B Jan 22 '15 at 19:14

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