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var map = new OpenLayers.Map("map");
var ol_wms = new OpenLayers.Layer.WMS(
"OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0",
{layers: "basic"}
);
var dm_wms = new OpenLayers.Layer.WMS(
"Canadian Data",
"http://www2.dmsolutions.ca/cgi-bin/mswms_gmap",
{
layers: "bathymetry,land_fn,park,drain_fn,drainage," +
"prov_bound,fedlimit,rail,road,popplace",
transparent: "true",
format: "image/png"
},
{isBaseLayer: false, visibility: false}
);
map.addLayers([ol_wms, dm_wms]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.zoomToMaxExtent();
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