[Qgis-developer] Raster providers

[John C. Tull]

Thanks for the update on this, Radim. I see that there will be some challenges to work out with wms and reprojection. Thanks for you hard work and great dev efforts,
John

On Mar 5, 2011, at 2:21 AM, Radim Blazek wrote:

> Hi,
> WMS reprojection should be fixed in sense that you get it rendered in
> the right place, but quality and even content is not the same like for
> not project on the same scale. Of course.
> 
> To find the best resolution coefficient is one thing which has to be
> done. Higher resolution in WMS request can give you (really gives?)
> slightly better image but the content becomes inappropriate. Currently
> th QgsRasterReprojector is using just nearest neighbour, another
> resampling methods should be considered.
> 
> Another issue is, that WMS driver does not automatically switches to
> projection requested by QGIS even if it is supported by WMS server.
> You have to manually select the right projection when layer is added.
> 
> Preferably, the WMS driver should not only to switch to the right
> projection, but also automatically
> select the most similar projection offered by server if no one exactly
> matches. Anybody is aware of an algorithm or ready for use method
> doing that?
> 
> Raster rendering appeared to be infinite entertainment.
> 
> Radim
> 
> On Mon, Feb 28, 2011 at 1:12 AM, John C. Tull <jctull at gmail.com> wrote:
>> Hi,
>> 
>> I was testing a little today. It appears that WMS layers are not being projected. I would imagine that needs to be corrected before a merge. Also, openlayers are not correctly projecting based on some quick tests on my end. I'm not sure if this is a problem with the branch or the plugin.