On Wednesday, October 21, 2009, Derek Watling <[email protected]> wrote: > > I am using Google base layers in OpenLayers 2.8 with a my own WMS overlay > that is only avalilable at at the top 3 zoom levels. My bounding box is set > to cover South Africa. I have the Google zoom levels limited to between 5 > and 18 with the following code: > > ... > var bbox = new OpenLayers.Bounds(bbox = 1780677, -4180188, 3683653, > -2512026); > var mapOptions = { > projection: new OpenLayers.Projection("EPSG:900913"), > units: 'm', > maxResolution: 156543.0339, > maxExtent: bbox, > restrictedExtent: bbox > }; > var map = new OpenLayers.Map('divMap', mapOptions); > map.addControl(new OpenLayers.Control.LayerSwitcher()); > > var gmap = new OpenLayers.Layer.Google("Google Streets", { > "sphericalMercator": true }); > gmap.MIN_ZOOM_LEVEL = 5; > gmap.MAX_ZOOM_LEVEL = 18; > > var myOverlay = new OpenLayers.Layer.WMS( > "Custom Overlay", > "http://dev/Tilecache/tilecache.py?";, > { layers: "Custom", 'maxExtent': bbox, format: "image/png" } > ); > myOverlay.setIsBaseLayer(false); > myOverlay.displayOutsideMaxExtent = 0; > myOverlay.transitionEffect = "resize"; > > map.addLayers([gmap, myOverlay]); > .... > > How do I tell OpenLayers that myOverlay only exists for the following > resolutions? > 2.38865713348388, 1.19432856674194, 0.597164283370971
have you tried passing these resolutions to youe WMS layer, through the "resolutions" config option. It should make OpenLayers "stop" the layer when it's out of range. Cheers, -- Eric Lemoine Camptocamp France SAS Savoie Technolac, BP 352 73377 Le Bourget du Lac, Cedex Tel : 00 33 4 79 44 44 96 Mail : [email protected] http://www.camptocamp.com _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
