[Qgis-developer] Re: Openlayers plugin and Virtual Earth (i.e.Bing Maps)

Fri Dec 3 00:25:15 EST 2010

Hi,

This is the screenshot (below) of offset - bing maps and trace
shapefile from google map.

https://352508258456434760-a-1802744773732722657-s-sites.googlegroups.com/site/qgisbingoffset/home/Screenshot.png?attachauth=ANoY7crKuHih7GmYN5reQr6Y2adfkYVgqdvhDvNfmzRyoIw0gph5YcpzEz5n8EtxTzrY_XSqDgfkmwUmV3Sb2qeW7Nq9XZ9VK7_aEglDxGUUSb4AHyLf0NjDPVdShf2JWF-VAF3W-kz-X5DQmLiqI8R-MidJwjxAFItZYuf4t3-kNiY2_nW4gdkaHkF2nvH8dcsmw3EIWKt1fO8SdSPQyoZKrwazx7oAdg%3D%3D&attredirects=0

Any ideas how can this offset be correct in Openlayers plugin?

It seems that JOSM manage to correct this offset.

http://lists.openstreetmap.org/pipermail/talk/2010-December/055151.html

Thanks.

Noli

On 12/3/10, Noli Sicad <nsicad at gmail.com> wrote:
> Hi,
>
> I am trying to add Virtual Earth (Bing Maps) to QGIS Openlayers plugin
> and I have trouble on the projection of Bing Maps (i.e. alignment). My
> shapefile layer (i.e.traces from the Google Maps) and other shapefile
> layers are off when I overlayed the Bing map (Bing Hybrid).
>
> Bing is far better Satellite imagery compare to Yahoo and Google. OSM
> is using Bing for traces lately as result of Steve Coast (OSM founder)
> working with Bing.
>
> http://wiki.openstreetmap.org/wiki/File:Selecting_Bing_in_JOSM.png
>
> I know that Bing uses different projection,
> http://www.cadmaps.com/gisblog/?p=80
>
>
> displayProjection: new OpenLayers.Projection("EPSG:4326"),
>
> Inserting this code above does not help at all.
>
> Here the entire code.
>
> <html xmlns="http://www.w3.org/1999/xhtml">
>   <head>
>     <title>OpenLayers Google Hybrid Layer</title>
>     <style type="text/css">
>         body {
>             margin: 0;
>         }
>         #map {
>             width: 100%;
>             height: 100%;
>         }
>         .olLayerGoogleCopyright {
>             left: 2px;
>             bottom: 2px;
>         }
>         .olLayerGooglePoweredBy {
>             left: 2px;
>             bottom: 15px;
>         }
>         .olControlAttribution {
>             font-size: smaller;
>             right: 3px;
>             bottom: 4.5em;
>             position: absolute;
>             display: block;
>         }
>     </style>
>     <!-- this gmaps key generated for http://openlayers.org/dev/ -->
>     <script
> src='http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAAjpkAC9ePGem0lIq5XcMiuhR_wWLPFku8Ix9i2SXYRVK3e45q1BQUd_beF8dtzKET_EteAjPdGDwqpQ'></script>
>     <script src="OpenLayers.js"></script>
>     <script type="text/javascript">
>         var map;
>
>         function init() {
>             map = new OpenLayers.Map('map', {
>                 theme: null,
>                 controls: [],
>                 projection: new OpenLayers.Projection("EPSG:900913"),
> 		displayProjection: new OpenLayers.Projection("EPSG:4326"),
>                 units: "m",
>                 maxResolution: 156543.0339,
>                 maxExtent: new OpenLayers.Bounds(-20037508.34,
> -20037508.34, 20037508.34, 20037508.34)
>             });
>
>             var gmap = new OpenLayers.Layer.Google(
>                 "Google Hybrid",
>                 {type: G_HYBRID_MAP, numZoomLevels: 19,
> 'sphericalMercator': true}
>             );
>             map.addLayer(gmap);
>             map.setCenter(new OpenLayers.LonLat(0, 0), 2);
>         }
>     </script>
>   </head>
>   <body onload="init()">
>     <div id="map"></div>
>   </body>
> </html>
>
> Any ideas how to solve this problem of non alignment of the layers using
> Bing.
>
> Thanks.
>
> Regards, Noli
>