Prasad, I'm not sure if this will help as I do not use the resolutions that much (probably should?).
Anyway, I set up an event that is triggered every time there is a zoom change. Then I can check the new zoom level and if the layer should be displayed at that layer I do something like turning it on or off. Of course it requires me to have arrays of display level thresholds for each layer - this I do in an application config file at load time. See http://www.ozdemo.org as a working example. Hope this can help you. map.events.register('zoomend', null, function(evt) { var macroCheckBox = document.getElementById('macro'); zmlevel= map.getZoom(); // run through the layer controls array setting Checkbox to deactive for (j=0; j<numLayers; j++) { var layId= 'layer'+j; var layerCheckbox = document.getElementById(layId) // if the layer is viewable at this layer set the checkbox to reflect if (zmlevel < Minzm[j] || zmlevel > Maxzm[j]) { layerCheckbox.disabled = true; layerCheckbox.checked=false; layerVisibility(layId); } else { layerCheckbox.disabled = false; if (macroCheckBox.checked) { layerCheckbox.checked= true; layerVisibility(layId); } } } Event.stop(evt); }); Cheers, Brad Spencer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Christopher Schmidt Sent: Thursday, 13 September 2007 10:47 PM To: Prasad Choudhary Cc: [email protected] Subject: Re: [OpenLayers-Users] Layer on/off On Thu, Sep 13, 2007 at 04:26:52AM -0700, Prasad Choudhary wrote: > > Hi again, > > I tried as you suggest, as > > which is @ http://prasad.choudhary.googlepages.com/markers.html > but still, not happening, is there some thing i missed out? please correct > me. The minResolution of the markers layer is not respecting the value you passed in. I can't see why this is at the moment, but it seems to be a bug. When I get time, I'll look into it -- for now, something like this will work: var markers = new OpenLayers.Layer.Markers( "Markers",{'minResolution': 0.3515625, 'maxResolution': 1.40625} ); map.addLayer(markers); markers.minResolution = .35; Regards, -- Christopher Schmidt MetaCarta _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
