[QGIS-trac] Re: [Quantum GIS] #1576: wms: no way to set width and height, but no error message when beyond max

[Quantum GIS]

#1576: wms: no way to set width and height, but no error message when beyond max
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        Reporter:  mlennert                          |         Owner:  nobody       
            Type:  bug                               |        Status:  new          
        Priority:  major: does not work as expected  |     Milestone:  Version 1.0.2
       Component:  WMS                               |       Version:  1.0.0        
      Resolution:                                    |      Keywords:               
Platform_version:                                    |      Platform:  Debian       
        Must_fix:  No                                |   Status_info:  0            
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Comment (by mlennert):

 Replying to [comment:3 mhugent]:
 > > 1) No way to set max values other then by resizing window.
 >
 > the min-max pixel values are a property of the server, not of the WMS
 client.
 > For QGIS as a WMS client, I don't see any other reasonable way of
 requesting the pixel resolution (WIDTH and HEIGHT parameters) of the QGIS
 map window.

 GRASS allows you to give row+col max values and then calculates the
 bounding boxes of all the tiles it has to download to respect both those
 max values and the bounding box of the total region. But I imagine that
 this is not as easy for simple viewing as in QGIS.

 >
 > I still need to check the WMS specs. As far as I remember, the max width
 height of the server is not given in all WMS version capabilities. Also,
 if the server does return only an empty image and no exception, QGIS
 cannot know that it is an error.
 >
 > >http://www.ngi.be/testbed/
 >
 > Please provide directly a wms url

 The problem is that you have to login to get access to their WMS server.
 Contact me off-trac and we should be able to find a way to get you access
 if you do not want to sign up (it's free, but only in French or Dutch).

 Moritz

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1576#comment:4>
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