[OpenLayers-Users] Mercator projected Images coordinate problem with layer

[Phil Scadden]

Openlayers WMS depends on the server sending the images in the map 
projection (the projection of the current baselayer). It cannot 
reproject image. When you say the server returns "mercator", then does 
that mean the google mercator? (Spherical mercator but using wgs84 
lat/long). If your server cant return google mercator, then you cant 
overlay your images on google maps with precision.

You can have the map in one projection (mercator) but have coordinates 
displayed in another (4326) by setting display projection to 4326 but 
projection to 900913 which is what you want. If your server wants 
lat/long in the GET URL, but openlayers is requesting in mercator, then 
you will need to reproject the coordinates yourself before they sent to 
the server in the code the creates the URL.

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