[OpenLayers-Users] Virtual Earth Issue

Wed May 13 07:26:32 EDT 2009

On Wed, May 13, 2009 at 02:48:03AM -0700, willson wrote:
> 
> I try to use the "spherical-mercator" example in openlayers/example to
> display mycity. I just change the map options "maxResolution" and
> "maxExtent". 

You can't do this -- at least not easily -- with spherical mercator layers.
I recommend using 'restrictedExtent' for the latter, and I don't think
there's a way to do the former.

-- Chris

> The question is : the map doesn't display mycity but whole
> china, when I zoom in, the map center goes to africa, and the map can't pan.
> All seems strange.
> Here is the code, any help would be appreciate!
> 
> <html xmlns="http://www.w3.org/1999/xhtml">
>   <head>
>     <link rel="stylesheet" href="../theme/default/style.css" type="text/css"
> />
>     <link rel="stylesheet" href="style.css" type="text/css" />
>     <style type="text/css">
>         .olControlAttribution { bottom: 0px!important }
>         #map {
>             height: 512px;
>         }
>     </style>
> 	
>     <script
> src="http://dev.ditu.live.com/mapcontrol/mapcontrol.ashx?v=6.1"></script>
>     
>     <script src="../lib/OpenLayers.js"></script>
>     <script type="text/javascript">
> 
>         // make map available for easy debugging
>         var map;
> 
>         // avoid pink tiles
>         OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
>         OpenLayers.Util.onImageLoadErrorColor = "transparent";
> 
>         function init(){
>             var options = {
>                 maxResolution: 0.002805990515625,
>                 maxExtent: new OpenLayers.Bounds(113.03035471400001,
> 22.125695214,		                                                    
> 113.74868828599999, 22.844028786)			
>             };
>             map = new OpenLayers.Map('map', options);
> 			
> 
> 
>             // create Virtual Earth layers
>             var veroad = new OpenLayers.Layer.VirtualEarth(
>                 "Virtual Earth Roads",
>                 {'type': VEMapStyle.Road, 'sphericalMercator': true}
>             );
>             var veaer = new OpenLayers.Layer.VirtualEarth(
>                 "Virtual Earth Aerial",
>                 {'type': VEMapStyle.Aerial, 'sphericalMercator': true}
>             );
>             var vehyb = new OpenLayers.Layer.VirtualEarth(
>                 "Virtual Earth Hybrid",
>                 {'type': VEMapStyle.Hybrid, 'sphericalMercator': true}
>             );
> 
>             
> 
>             map.addLayers([veroad, veaer, vehyb]);
>             map.addControl(new OpenLayers.Control.LayerSwitcher());
>             map.addControl(new OpenLayers.Control.EditingToolbar(vector));
>             map.addControl(new OpenLayers.Control.Permalink());
>             map.addControl(new OpenLayers.Control.MousePosition());
>             if (!map.getCenter()) {map.zoomToMaxExtent()}
>         }
> 
>     </script>
>   </head>
>   <body onload="init()">
>     <h1 id="title">OpenLayers Spherical Mercator Example</h1>
> 
>     <div id="tags">
>     </div>
>     
>     <div id="map" class="smallmap"></div>
> 
>     <div id="docs">
>     </div>
>   </body>
> </html>
> 
> 
> 
> 
> -- 
> View this message in context: http://n2.nabble.com/Virtual-Earth-Issue-tp2880849p2880849.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
> 
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-- 
Christopher Schmidt
MetaCarta