Map.baseLayers = {
    defaultCentre: [7, 48.9, 0], // centre of W Europe
    mapOptions: {
        maxExtent: new OpenLayers.Bounds(-11, 35, 30, 70),
        resolutions: [0.06,0.04,0.02,0.01] // 19M,13M,6M,3M
    },
    get: function() {
        var iceds =  '<a target="_blank" href="http://iceds.ge.ucl.ac.uk/">ICEDS</a>';
        return [
            new OpenLayers.Layer.WMS( "SRTM",
                "http://iceds.ge.ucl.ac.uk/cgi-bin/icedswms?",
                {layers: 'srtm30'},
                { buffer: 0, attribution: 'SRTM relief maps from '+iceds,
                    tileSize: new OpenLayers.Size(200, 200) }
            )
        ]
    }
}