[OpenLayers-Users] WMS overlay with Google and OSM

[Dan Lear]

Hi,

I have the following code (mostly lifted from the OL examples):

<script type="text/javascript">
        var lon = 5;
        var lat = 40;
        var zoom = 5;
        var map, select;

        function init(){
            var options = {
                projection: new OpenLayers.Projection("EPSG:900913"),
                displayProjection: new OpenLayers.Projection("EPSG:4326"),
                units: "m",
                maxResolution: 156543.0339,
                maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34,
                                                 20037508.34, 20037508.34)
            };
            map = new OpenLayers.Map('map', options);
            var mapnik = new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)");
            var gmap = new OpenLayers.Layer.Google("Google", {sphericalMercator:true});

var dm_wms = new OpenLayers.Layer.WMS(
    "Crab Data",
    "http://warehouse1.indicia.org.uk:8080/geoserver/wms?bbox=-142385,6693234,25943,6710384&styles=dist_point_blue&Format=image/png&request=GetMap&version=1.1.1&layers=risc:mitten_crab_all&width=800&height=300&srs=EPSG:4326&cql_filter=record_status=%27C%27"
    ,
    {isBaseLayer: false, visibility: false}
);			
			
			
            map.addLayers([mapnik, gmap, dm_wms]);


            map.addControl(new OpenLayers.Control.LayerSwitcher());

            map.zoomToExtent(
                new OpenLayers.Bounds(
                    68.774414, 11.381836, 123.662109, 34.628906
                ).transform(map.displayProjection, map.projection)
            );
        }

    </script>

Which I want overlay the WMS from a Geoserver instance (dm_wms), but it isn't displaying, I suspect it's a projection issue, but don't understand enough to fix it! Also need the map to set focus on the UK, is there somewhere I can find the bounds required or is it just a case of trial and error?

Thanks for any help received,
Dan