[QGIS-trac] [Quantum GIS] #3853: Problems with some WMS services (from toronto.ca/open)

[Quantum GIS]

#3853: Problems with some WMS services (from toronto.ca/open)
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   Reporter:  mgleahy                           |              Owner:  nobody       
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.7.0
  Component:  Build/Install                     |            Version:  1.6.0        
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  No           
Status_info:  0                                 |  
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 I've notice a problem when I try to load layers from the WMS services
 listed at http://toronto.ca/open (follow the big "Get the Data" link, then
 scroll to the bottom of the page).  When I connect to these directly
 within QGIS, I can see the list of layers, projection info, etc.  But when
 I try to add them to the map the layers just appear blank (and do not have
 default extents that I can zoom to). You can try it yourself by adding a
 WMS server in QGIS with the 'CONNECTION' url in the sample mapfile below,
 then try adding one or more layers from it...the layers will appear in the
 layer control in QGIS, but no data will appear in the map. Using the
 sample mapfile below, I was able to use !MapServer as a local proxy for
 the WMS service. By connecting QGIS to the wms_onlineresource metadata
 parameter below, I am able to get the Ortho Imagery displayed from the
 Toronto WMS service.

 Based on this, !MapServer clearly doesn't have a problem requesting data
 from the Toronto WMS service. QGIS in turn is able to use !MapServer.
 However, although this can serve as a workaround, it isn't an ideal
 solution. It appears that this is a problem with the ability of QGIS to
 interoperate directly with the Toronto WMS service.  I checked with the
 users list first, and it was recommended that this be reported here.

 /path/to/wms.map:
 {{{
 MAP
 NAME "Toronto OrthoImagery (proxy)"
 STATUS ON

 SIZE 1024 1024
 EXTENT 292998.8237 4824999.2385 336000.8237 4858001.2385
 UNITS meters

 PROJECTION
 "init=epsg:2019"
 END

 IMAGECOLOR 255 255 255
 TRANSPARENT ON

 WEB
 METADATA
 'wms_title' 'Toronto OrthoImagery (proxy)'
 'wms_onlineresource' 'http://localhost/cgi-
 bin/mapserv?map=/path/to/wms.map&'
 'wms_srs' 'EPSG:2019'
 'ows_enable_request' '*'
 END
 END

 LAYER
 NAME "Ortho Imagery 50cm 2005"
 STATUS ON
 TYPE RASTER
 CONNECTION
 "http://map.toronto.ca:80/servlet/com.esri.wms.Esrimap/OrthoImagery?"
 CONNECTIONTYPE WMS
 METADATA
 "wms_srs" "EPSG:2019"
 "wms_name" "Ortho Imagery 50cm 2005"
 "wms_server_version" "1.1.1"
 "wms_format" "image/png"
 "wms_title" "Ortho Imagery 50cm 2005"
 END
 PROJECTION
 "init=epsg:2019"
 END
 END
 END

 }}}

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/3853>
Quantum GIS <http://qgis.org>
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