[Qgis-user] QGIS Server project files served to OpenLayers question

[Andrea Peri]

Hi, the standard OGC wms allow to access to the feature using an identify
getfeatureinfo of kind text/GML . this is supported from mapserver andò
geoserver. Afaik qgis.server font supporto this. Qgis ad client wms
supporto the request getfeatureinfo forward a serverwms supporting
getfeatureinfo text/GML. But qgis.server dont understand text/GML. Just to
know qgis.server dont supporto the multiple styles forma a single layer.
Regards.
Il 17/gen/2014 19:07 "Peter Len" <peteralen at earthlink.net> ha scritto:

> I have been playing with the QGIS Server and looking at how it serves up
> QGIS Desktop project files using WMS.  My initial tests were to create a
> new WMS layer in QGIS Desktop which used a URL to serve up a project file.
>  When I did this, QGIS Desktop listed all of the layers within the project
> file to choose from.  I could pick and choose which ones to add to the new
> project file.  I also found that when I selected a feature layer (feature
> points from our database), the Identify Features tool showed the selected
> feature metadata which meant that although the layer was served up over
> WMS, it still understood it to be a feature layer.  The next step was to
> try to load the project file in OpenLayers (using an OpenLayers.Layer.WMS
> object).  When trying this, I found the following:
>
> 1) I needed to list the WMS layer as an image
> 2) I could give the file path to the project file using the "map" option
> 3) I had to list the name of the layer.  When I used a GetCapabilities URL
> in the browser for a given project file, I see that there is always a Layer
> with the name of the project file and SOMETIMES there is another layer name
> for one of the actual layers within the project.  I have yet to see a
> GetCapabilities for a project file that listed all the layer names.  In any
> case, if I used the project file name as the layer name option, it would
> indeed display everything on the OpenLayers map.
>
> I guess as expected, because the layer was displayed as an image and as a
> single layer, there was no access to the feature metadata (like there is
> with the Feature Identify tool in QGIS Desktop).  The layer was simply a
> WMS image.  Based on this, my conclusion is that there is no way to select
> and view individual features from my QGIS project file when the client is a
> browser-based mapping API like OpenLayers.  Does this sound about right, or
> am I missing some other way to have OpenLayers understand that there are
> actual features, like points, lines, and polygons?
>
> Thanks for any thoughts - Peter
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