[OpenLayers-Users] WMS overlay alignment on Google Map baselayer

Arnd Wippermann arnd.wippermann at web.de
Wed Aug 23 14:08:08 CDT 2006


Hello,

I have some problems to understand the discussion. 

To get tiles from any data provider I have to use the projection the data
provider supports. For WMS the BBOX must contain values, which lie in this
projection. 

When I use a projection in OpenLayers, which is not supported by the data
provider, I'm not able with reprojection of the BBOX-values to get the
correct tiles. A square in one projection is not a square in the other
projection. 

Therefor I must use a mapserver (when the data provider, who often support
various projections,  not support the projection I want), which is able to
reproject data and send back the correct distorted (to the original
projection of the data provider) image to OpenLayers. I have to use a
program (mapserver), which is able to distort images. With Javascript there
is no possibly to do this.

When I'm wrong, please some clues so I can follow the discussion.

Mit freundlichen Grüssen

Arnd Wippermann
http://gis.ibbeck.de/pinguinale/





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