[mapserver-users] How do a GetFeatureInfo on a group layers

[Andrea Peri]

Hi Eichner,

The GROUP tag effectively allow set the Name and abstract. This is great,
but it don't allow the GetFeatureInfo request. :(

I try it, but on my qgis the identify icon is disabled.

I try to see the GetCapabilities.
http://web.regione.toscana.it/wmsraster/com.rt.wms.RTmap/wms?map=wmscatasto&&SERVICE=WMS&request=getcapabilities

And effectively the layer
rt_cat.idcatacque
is not reported as "queryable".

So the GROUP tag don't allow the GetFeatureInfo as single aggregation.

Perhaps a bug for MapServer ?

2012/7/30 Eichner, Andreas - SID-NLKM <Andreas.Eichner at sid.sachsen.de>

>
> wms_layer_group
>
>     Description: (Optional) Can be used to assign a layer to a number of
> hierarchically nested groups. This grouped hierarchy will be expressed
> in the capabilities.
>
>     WMS_LAYER_GROUP is different from the GROUP keyword in that it does
> not publish the name of the group in the capabilities, only the title.
> As a consequence the groups set with WMS_LAYER_GROUP can not be
> requested with a GetMap or GetFeatureInfo request (see section 7.1.4.5.2
> of the WMS implementation specification version 1.1.1. (OGC 01-068r2)).
> Another difference is that GROUP does not support nested groups. The
> purpose of this metadata setting is to enable making a WMS client aware
> of layer grouping.
>
>     All group names should be preceded by a forward slash (/). It is not
> allowed to use both the WMS_LAYER_GROUP setting and the GROUP keyword
> for a single layer.
>
>
> > The GetFeatureInfo now work.
> > But as a indesiderable secondary effect is disappeared the
> > Group-name from the getcapabilities.
> >
> > There is some workaround to add a group-name to the getcapabilities ?
>
> Yes, see http://mapserver.org/ogc/wms_server.html#layer-object-metadata:
>
> wms_layer_group: [...] WMS_LAYER_GROUP is different from the GROUP
> keyword in that it does not publish the name of the group in the
> capabilities, only the title. As a consequence the groups set with
> WMS_LAYER_GROUP can not be requested with a GetMap or GetFeatureInfo
> request [...]
>
> Use the GROUP keyword on all and a wms_group_title (and optionally
> wms_group_abstract) metadata on one of the layers corresponding to that
> group. So it should become something like that
>
>  LAYER
>     GROUP "rt_cat.idcatbdfog"
>     NAME "rt_cat.idcatbdfog.ar"
>     STATUS DEFAULT
>     TYPE POLYGON
>     DATA '/path-to-data/shapefile'
>     PROJECTION
>       "init=epsg:3003"
>     END
>     METADATA
>       ...
>       "ows_include_items" "all"
>       wms_group_title "The rt_cat.idcatbdfog group"
>         wms_group_abstract "This group is intented to show all layers
> that belong to rt_cat.idcatbdfog"
>     END
>     TEMPLATE 'void'
> [...]
>
> This should hopefully work as you want. Greets.
>



-- 
-----------------
Andrea Peri
. . . . . . . . .
qwerty àèìòù
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