[OpenLayers-Users] Google and UK grid vector overlay

[Mauro Bianchi]

Hi Arnd.
thank you for your response.

No, i didn't include proj4js in my page.
Now I've tried to include it in my html page (and include all the
definitions), but it still does not work.

Any other ideas?
Thank you!

Mauro





2009/1/13 Arnd Wippermann <arnd.wippermann at web.de>:
> The code is correct.Have you included proj4js in your page?
>
> Otherwise
> Transform depends on the proj4js library.
> If proj4js is not available, then this is just an empty stub.
>
>
> Arnd Wippermannn
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] Im
> Auftrag von Mauro Bianchi
> Gesendet: Dienstag, 13. Januar 2009 11:51
> An: users at openlayers.org
> Betreff: [OpenLayers-Users] Google and UK grid vector overlay
>
> Dear all,
> I'm pretty new to OL and I want to do the following
>
> 1) have a google layer as a base layer
> 2) overlay a vector layer and add points programmatically. Points
> coordinates are given in the UK national grid system (OSGB , which should be
> EPSG:27700)
>
> I could convert points coordinates externally, but I'd prefer to do it
> directly into OpenLayers, if possibile.
> I tried different methods but cannot get it working.
> Any help would be really appreciated!
>
> Thank you
> Mauro
>
>
> My code is the following
>
>
> var map;
>
> var options = {
>        projection: new OpenLayers.Projection("EPSG:900913"),
>        displayProjection: new OpenLayers.Projection("EPSG:4326"),
>        units: "m",
>        numZoomLevels: 18,
>        maxResolution: 156543.0339,
>        maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
>
> 20037508, 20037508.34)
> };
>
> map = new OpenLayers.Map('map', options);
>
> //google maps layer, physical
> var gphy = new OpenLayers.Layer.Google(
>        "Google Physical",
>        {type: G_PHYSICAL_MAP, numZoomLevels: 20,  'sphericalMercator':true}
> );
>
> map.addLayers([gphy]);
>
>
> //a vector layer where i want to add points programmatically var vectorLayer
> = new OpenLayers.Layer.Vector("My Geometry");
>
> //this is a point that i want to add in UK grid coordinates var point = new
> OpenLayers.Geometry.Point(519000, 165222).transform( new
> OpenLayers.Projection("EPSG:27700"), map.projection); var pointFeature = new
> OpenLayers.Feature.Vector(point);
>
> vectorLayer.addFeatures([pointFeature]);
>
> map.addLayer(vectorLayer);
>
> //controls and centering
> map.addControl(new OpenLayers.Control.LayerSwitcher());
> map.setCenter(new
> OpenLayers.LonLat(-0.126343,51.539502).transform(map.displayProjection,
> map.projection), 10);
>
>
>
>
> --
> Mauro Bianchi
> bianchimro at gmail.com
> _______________________________________________
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> http://openlayers.org/mailman/listinfo/users
>
>



-- 
Mauro Bianchi
bianchimro at gmail.com