On Wed, Feb 03, 2010 at 10:41:51AM -0800, Tom B wrote: > > Hi all, > > In the attached code, the WMS overlay is shown fine at zoom level 1, but at > zoom level 0, it disappears. If I either remove the "singleTile: true" > option, or use a MetaCarta base layer instead of the Google one, then the > overlay shows up fine at zoom level 0.
The problem is usually that Google wraps the world, so when we ask for corners, the bbox ends up being invalid. -- Chris > I took a look at the WMS request at map.layers[1].grid[0][0].url at zoom > level 0, and GeoServer renders that URL fine, so it looks like this issue is > related to OpenLayers. > > Any ideas of what might be going wrong here? > > Best, > Tom > > <html xmlns="http://www.w3.org/1999/xhtml";> > <head> > <script type="text/javascript" > src="http://maps.google.com/maps?file=api&v=2&sensor=false > > &key=ABQIAAAAmlH3GDvD6dTOdZjfrfvLFxTkTKGJ2QQt6wuPk9SnktO8U_sCzxTyz_WwKoSJx63MPLV9q8gn8KCNtg"> > </script> > <script src="http://www.openlayers.org/api/OpenLayers.js";></script> > <script type="text/javascript"> > var lon = 5; > var lat = 40; > var zoom = 1; > var map, layer; > > function init(){ > > var mapOptions = { > controls: [], > projection: new > OpenLayers.Projection("EPSG:900913"), > units: "m", > maxResolution: 156543.0339, > maxExtent: new OpenLayers.Bounds(-20037508.34, > -20037508.34, > 20037508.34, 20037508.34), > restrictedExtent: new > OpenLayers.Bounds(-20037508.34, -20037508.34, > 20037508.34, 20037508.34), > minZoomLevel: 2 > }; > > map = new OpenLayers.Map('map', mapOptions); > > map.addControl(new OpenLayers.Control.PanZoomBar()); > > if(true){ > var base_layer = new OpenLayers.Layer.Google( > "Google Satellite", > { > type: G_SATELLITE_MAP, > sphericalMercator: true, > isBaseLayer: true > } > ); > }else{ > var base_layer = new OpenLayers.Layer.WMS( > "OpenLayers WMS", > "http://labs.metacarta.com/wms/vmap0";, > { > layers: 'basic', > sphericalMercator: true, > isBaseLayer: true > } > ); > } > map.addLayer(base_layer); > map.setBaseLayer(base_layer); > > > map.setCenter(new OpenLayers.LonLat(lon, lat), zoom); > map.addControl( new OpenLayers.Control.LayerSwitcher() ); > > var new_layer = new OpenLayers.Layer.WMS('asdf', > "http://sds7.itc.virginia.edu:8080/thdl-geoserver/wms";, > { > layers: 'thl:roman_popular_poly', > transparent: true, > sphericalMercator: true, > projection: new > OpenLayers.Projection("EPSG:900913"), > units: "m", > CQL_FILTER: "fid=1" > }, > { > singleTile: true > } > ); > map.addLayer(new_layer); > > > } > </script> > </head> > <body onload="init()"> > > <div id="map" class="smallmap"></div> > > </body> > </html> > -- > View this message in context: > http://n2.nabble.com/WMS-overlay-not-shown-at-zoom-level-0-when-singleTile-true-tp4508945p4508945.html > Sent from the OpenLayers Users mailing list archive at Nabble.com. > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
