I&#39;m a newbie, I copied this from an example somewhere to start:<br><br>map = new OpenLayers.Map(&#39;map&#39;,<br>        {<br>            numZoomLevels: 19,<br>              maxResolution: 156543.0399,<br>              units: &#39;m&#39;,<br>
              projection: new OpenLayers.Projection(&quot;EPSG:900913&quot;),<br>              displayProjection: new OpenLayers.Projection(&quot;EPSG:4326&quot;)<br>        });<br><br><br>    var layerMapnik = new OpenLayers.Layer.OSM.Mapnik(&quot;Mapnik&quot;);<br>
map.addLayers([layerMapnik,layerTah]);<br>