Max,
One solution would be to use EPSG:900913 as the display projection in
OpenLayers and reproject the WMS layers on the fly using mapserver as a
proxy. You can configure mapserver to act as a WMS client to retrieve
the data in EPSG:4326 and have it act as a WMS server providing the data
in EPSG:900913.
I see there has been some experimental work done on client-side
reprojection
(http://trac.osgeo.org/openlayers/browser/sandbox/camptocamp/canvas/openlayers/examples/raster-reprojection.html?rev=10509)
in OpenLayers, but I don't know about it's robustness or performance.
Best Regards,
Brent Fraser
On 11/17/2010 7:29 AM, Max Stephan wrote:
Hi,
we are experiencing some problems with overlaying google-BaseLayers with
other WMS-Layers. To describe the Situation: We are setting up a Geoportal
in which the user can add Layers from external WMS-Servers. But most of this
servers don´t support EPSG:900913 which means the overlay is not possible.
Now we´re looking for possibilities to solve this problem. One could be to
reproject the google-Baselayer to EPSG:4326. We don´t know how to exactly
implement this but we´re thinking of something like a mapproxy between the
google-Servers and our client which is able to reproject on the fly. But
apart from the technical side there could be some legal problems in doing
this. I don´t know if google allows you to do this kind of reprojection.
Do you have any other ideas?
Thanks in advance
Max Stephan
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