[OpenLayers-Users] WMS layer overlay on google map

[Christopher Schmidt]

On Wed, Feb 04, 2009 at 03:00:28PM +0530, Subha Ramakrishnan wrote:
> Hi,
> 
> I want to overlay a WMS layer on google base map (Google Physical).
> The image that I have is a raster data and am using MapServer to show 
> the image.
> The data is in Transverse Mercator projection.

Reproject it on the server to spherical mercator.

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

-- Chris  

> I'm able to get the image when I hit the mapserver url in the browser, 
> provided i give the extent in meters for that particular country but 
> using OL, i get only a blank image.
> The projection is 4326 in the map file.
> 
> OL code:
> var twms1 = new OpenLayers.Layer.WMS( 
> "Land_use_cover_from_SPOT","http://localhost/cgi-bin/mapserv?",
>             { map: "Land_use_cover_from_SPOT.map",
>             units: "m",
>               transparent: 'true', layers:"Land_use_cover_from_SPOT",
>               format: 'image/png',
>             maxExtent: new 
> OpenLayers.Bounds(1610000,6568500,1638000,6594000),
>               //maxExtent: new OpenLayers.Bounds(60,0,100,40)
>               //maxResolution: 156543.0339,
>               projection:"EPSG:4326",reproject:false
>              
>             },{singleTile: 'true'});
> map.addLayers([twms1]);
> 
> Does some one know how to project transverse mercator on Google map??
> 
> Please help.
> 
> Thanks & regards,
> Subha
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-- 
Christopher Schmidt
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