[mapserver-users] WMS layer swapping according to scale

[Rahkonen Jukka]

Hi,

Layers cannot have a same name in WMS. Use different names for layers and put them under the same GROUP. Use GROUP in WMS requests. Layers could look like

LAYER
        GROUP "group"
        NAME "close"
        STATUS ON
        DATA "close.shp"
        TYPE POLYGON
        MAXSCALEDENOM  60000
        METADATA
              "wms_title"    "close"
          END
END 
LAYER
         GROUP "group"
         NAME "far"
         STATUS ON
         DATA "far.shp"
         TYPE POINT
         MINSCALEDENOM 60000 
         METADATA
              "wms_title"    "far"
         END
END 

-Jukka Rahkonen-

Gracia Fernández López wrote:
> 
> Hello,
> 
> I want to replace the polygon representations in a layer by markers
> when the zoom is out of a scale level.
> 
> To do that, I have defined two layers in Mapserver to represent the
> same objects: one of them is a Polygon, and the other one is a Point
> (centroid), and I want to swap one for the other depending on the
> scale.
> 
> With the Mapserver queries, I had defined the same name for both
> layers and it worked well. Now I need to do the same with WMS queries,
> but neither I can assign the same name to the layers (if I do that
> they are changed automatically), nor use the GROUP option (I obtain a
> warning with GetCapabilities). I also tried using the parameter
> wms_group_layer, but it puts a common title but not a common name, so
> I can not query the group in the LAYERS param.
> 
> Do anyone knows how to solve this issue in Mapserver? Or do I have to
> do that in the viewer side?
> 
> Thanks in advance for any help.
> 
> --
> Regards
> Gracia
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>