Jason,<br><br>I am using Google Streets actually :). It just isn't working out for me atm...<br><br><br>Andreas,<br><br>I tried both suggestions. I got rid of the 'map' parameter in the map instantiation and had the same result, the layer was blank. Then I tried again with using my options variable in my mapPanel and nothing loaded up at all when I did this :(<br>
My entire page was blank...<br><br>Thanks,<br><br>elshae<br><br><div class="gmail_quote">On Fri, Sep 24, 2010 at 10:39 AM, Andreas Hocevar <span dir="ltr"><<a href="mailto:ahocevar@opengeo.org">ahocevar@opengeo.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi,<br>
<br>
the problem here is that you configure the OpenLayers map in the wrong mode. See below:<br>
<div class="im"><br>
On Sep 23, 2010, at 21:43 , IT Intern wrote:<br>
<br>
> Hello GeoExt users,<br>
><br>
> This one's gotten me totally stumped. I have some base layers and a few wms overlays. When my page loads it shows the base layer for a quick second and then goes blank as it loads my overlays. It stays blank until I click the map, etc. Then it displays properly. I've Googled all sorts of things concerning this sort of issue and have come up with nothing that gives me a hint as to why this could be. This never happened to me before until I started using GeoExt to display my map. Is it something in code I must write for GeoExt or OpenLayers so that this doesnt happen? It's driving me crazy!!!<br>
><br>
> Code:<br>
><br>
> //Base Layers<br>
><br>
> var ghyb = new OpenLayers.Layer.Google(<br>
> "Google Hybrid",<br>
> {type: google.maps.MapTypeId.HYBRID, numZoomLevels: 20}<br>
> );<br>
><br>
> var gmap = new OpenLayers.Layer.Google(<br>
> "Google Streets", // the default<br>
> {numZoomLevels: 20},{visibility: true}<br>
> );<br>
><br>
> var osm = new OpenLayers.Layer.OSM();<br>
><br>
> //.....<br>
> ....<br>
> ....<br>
><br>
> var options = {<br>
> controls: [new OpenLayers.Control.Navigation()],<br>
> maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34),<br>
> maxResolution: "auto",<br>
> projection: new OpenLayers.Projection("EPSG:900913"),<br>
> units: 'm',<br>
> allOverlays: false<br>
> }<br>
><br>
><br>
> var map = new OpenLayers.Map('map', options);<br>
<br>
</div>Wrong! If at all, use the following instead:<br>
<br>
var map = new OpenLayers.Map(options);<br>
<br>
You don't want to render the map at this point, so you have to configure it without a map div.<br>
<div class="im"><br>
<br>
> map.addLayers([gmap, ghyb, osm, all_chn, all_tib, chn_bridges, tib_bridges, chn_countys, tib_countys, chn_farms, tib_farms, chn_glaciers, tib_glaciers, chn_grazing, tib_grazing, chn_hwyCrew, tib_hwyCrew, chn_hospitals, tib_hospitals, chn_lakes, tib_lakes, chn_monastaries, tib_monastaries, chn_pass, tib_pass, chn_rivers, tib_rivers, chn_townships, tib_townships, chn_villages, tib_villages]);<br>
><br>
> var mapPanel = new GeoExt.MapPanel({<br>
> title: "Map",<br>
> map: map,<br>
<br>
</div>Now the preferred way to configure a MapPanel would be to remove the "var map = ..." above entirely, and configure the map here:<br>
<br>
map: options,<br>
layers: [gmap, ghyb, osm, all_chn, all_tib, chn_bridges, tib_bridges, chn_countys, tib_countys, chn_farms, tib_farms, chn_glaciers, tib_glaciers, chn_grazing, tib_grazing, chn_hwyCrew, tib_hwyCrew, chn_hospitals, tib_hospitals, chn_lakes, tib_lakes, chn_monastaries, tib_monastaries, chn_pass, tib_pass, chn_rivers, tib_rivers, chn_townships, tib_townships, chn_villages, tib_villages]<br>
<br>
Regards,<br>
Andreas.<br>
<div><div></div><div class="h5"><br>
> center: map.setCenter(new OpenLayers.LonLat(93.9, 29.53).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject())),<br>
> zoom: 9,<br>
> region: "center",<br>
> bbar: [{<br>
> xtype: "label",<br>
> text: "Scale = 1 : "<br>
> }],<br>
> items: [{<br>
> xtype: "gx_zoomslider",<br>
> vertical: true,<br>
> height: 300,<br>
> x: 10,<br>
> y: 20,<br>
> plugins: new GeoExt.ZoomSliderTip()<br>
> }]<br>
> });<br>
><br>
> var layerRoot = new Ext.tree.TreeNode({<br>
> text: "All Layers",<br>
> expanded: true,<br>
> autoLoad: true<br>
> });<br>
><br>
> //Is there something to set here???<br>
> layerRoot.appendChild(new GeoExt.tree.BaseLayerContainer({<br>
> text: "Base Layers",<br>
> map: map,<br>
> layerStore: mapPanel.layers,<br>
> expanded: true,<br>
> autoLoad: true<br>
> }));<br>
><br>
> //.....<br>
><br>
> Thank you very much, I appreciate any suggestions :),<br>
><br>
> elshae<br>
><br>
><br>
><br>
</div></div><div><div></div><div class="h5">> _______________________________________________<br>
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<br>
<br>
<br>
</div></div><font color="#888888">--<br>
Andreas Hocevar<br>
OpenGeo - <a href="http://opengeo.org/" target="_blank">http://opengeo.org/</a><br>
Expert service straight from the developers.<br>
<br>
</font></blockquote></div><br>