[OpenLayers-Users] Re projecting Google

[Mike Adair]

I've added a test point for EPSG:27700 to proj4js and it is accurate to 
less than a mm.  I was encountering a problem in that the proj4 C code 
codes the datum name as 'OSGB36' whereas spatialreference.org is 
returning 'OSB36', not sure why.  In any case I've added an alias for 
that in proj4js now.

Mike

Christopher Schmidt wrote:
> On Wed, Jan 09, 2008 at 03:27:11AM -0800, Jon Britton wrote:
>   
>> Hi,
>> I've got data in EPSG:27700 (British National Grid) and want to overlay it
>> on Google data. However, I want to reproject the Google data into EPSG:27700
>> and not the other way around. Can this be done?
>>     
>
> Project the google *data*? Google ain't yours, man: You can't do
> anything fun with it (and definitely not reproject it!)
>
>   
>> Alternatively, can OpenLayers convert from Google coordinates to EPSG:27700
>> coordinates? All I need is to be able to get the 27700 coordinates of the
>> current view.
>>     
>
> It is possible, using the trunk versio of OpenLayers, to convert from
> Google coordinates to lon/lat. It is possible, using proj4js or perhaps
> a custom transformation function, to convert from lon/lat to EPSG:27700.
> I know of at least one person who has done it -- I'll try and remember
> who and get him to post.
>
> Regards,
>