[OpenLayers-Dev] LonLat to place marker.

[Christopher Schmidt]

On Mon, Sep 07, 2009 at 06:33:47PM +0100, Richard Ive wrote:
> Hey.
> 
> 
> I've got a script that calculates the lon & lat of a OS Grid Reference.
> 
> The function returns an OpenLayers.LonLat object as follows:
> lon=51.499435634436,lat=-0.21041620665612
> 
> If you put that into google maps (in reverse order as google accepts lat
> long) it's position is correct.
> 
> However if I do :
> 
> lonLat = OSGridToLatLong(osGrid);
> driver.addMarker(new OpenLayers.Marker(lonLat,icon));
> 
> The marker appears 1000's of miles directly south of where it should be.
> 
> Has anyone any idea why this may be happening?

My guess is that youre using an OSM map or a spherical mercator ap.
In that case, you need to reproject your lonlat.

http://docs.openlayers.org/library/spherical_mercator.html

> Thanks.
> 
> -- 
> Regards,
> Richard Ive.

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-- 
Christopher Schmidt
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