[GIS] How to uncheck a layer in LayerSwitcher on map load

openlayers-2

I have four layers in the LayerSwitcher. When the map is loaded all the layers are checked by default. I do not want to show all Layers as checked.How do I uncheck a layer when the map is loaded?

Best Answer

Use the layer's setVisibility function to turn them off before you add them to the map.

Related Solutions

[GIS] Layer added but not displayed until i turn off then on in LayerSwitcher

Well it's working now. I guess you need to call the refresh operation like so:

function AddResultsLayer() {

    var wfs = new OpenLayers.Layer.Vector("WFS", {
        strategies: [new OpenLayers.Strategy.BBOX()],
        protocol: new OpenLayers.Protocol.WFS({
            url: "http://demo.opengeo.org/geoserver/wfs",
            featureType: "tasmania_roads",
            featureNS: "http://www.openplans.org/topp"
        }),
        styleMap: new OpenLayers.StyleMap({
            strokeWidth: 3,
            strokeColor: "#333333"
        })
    })
    map.addLayer(wfs);
    wfs.refresh();

}

Key line being:

wfs.refresh();

[GIS] LayerSwitcher() not working with Group Layers from Geoserver

I do not completely understand your question, but when it comes to layer groups from Geoserver affecting the LayerSwitcher in OpenLayers: this is impossible, OpenLayers cannot tell the difference between a layer group wms and a single layer wms.

As for your problem with "one layer switching off when the other is turned on": This is because OpenLayers treats your wms layers as baselayers. Try to add isBaseLayer: false to the properties of one of your layers (and perhaps transparent: true), then they will show up at the same time

Best Answer

Related Solutions

[GIS] Layer added but not displayed until i turn off then on in LayerSwitcher

[GIS] LayerSwitcher() not working with Group Layers from Geoserver

Related Question