[mapserver-users] WMS GetFeatureInfo beyond scale

[seis4web at web.de]

Hi David, 
hi list,

thank you very much for the reply. I already use scale-dependent layers. That's why I believe I can't organize my "data as scale-dependent classes within one layer instead of as various separate layers in a group" .  But I'm not sure - so please have a look at my data structure below (or in the attached file - part of my mapfile): 

I have got a WMS displaying earthquake data for the last 12 month (GROUP A), last month (GROUP B), the last 7 days (GROUP C) and the actual (latest) earthquake (GROUP D).

Each group has got a couple of scale-dependent layers (A_a,  A_b, A_c; B_a, B_b ...). I've grouped the layers because all layers displaying earthquake events from e.g. the last 12 month should appear as just one layer.

Each layer has got several magnitude-dependent classes, as the earthquake dots should increase when zooming into the application.

  LAYER
 	NAME "A_a"	
 	GROUP "A"                                     
        MAXSCALE 10000000
        MINSCALE 4000000
        ...
        CLASS
	   NAME "Magnitude > 3 - 3.499"
	   EXPRESSION ([mag] > 3 AND [mag] < 3.499)
 	   STYLE
 	     SYMBOL "circle"
 	       SIZE 9
 	       COLOR 255 165 0
 	       OUTLINECOLOR 255 0 0
 	     END
	 END
	 CLASS
 	   NAME "Magnitude > 3.5 - 3.999"
	   EXPRESSION ([mag] > 3.5 AND [mag] < 3.999)
	   STYLE
 	     SYMBOL "circle"
 	     SIZE 10
 	     COLOR 255 165 0
 	     OUTLINECOLOR 255 0 0
 	   END
	 END
 ...
  LAYER
 	NAME "A_b"	
 	GROUP "A"                                     
        MAXSCALE 4000000
        MINSCALE 1000000
        ...
        CLASS
          ...
        END
 ...
  LAYER
 	NAME "A_c"	
 	GROUP "A"                                      
        MAXSCALE 1000000
        MINSCALE  ...
        ...
        CLASS
          ...
        END
 ...


Thanks in advance!
Regards,
Nina


> -----Ursprüngliche Nachricht-----
> Von: "Fawcett, David" <David.Fawcett at state.mn.us>
> Gesendet: 02.10.09 18:00:44
> An:     <mapserver-users at lists.osgeo.org>
> Betreff: RE: [mapserver-users] WMS GetFeatureInfo beyond scale


> Is there a reason why you can't organize your data as scale-dependent classes within one layer instead of as three separate layers in a group?  
> 
> David.
> 
> -----Original Message-----
> From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of seis4web at web.de
> Sent: Friday, October 02, 2009 10:45 AM
> To: mapserver-users at lists.osgeo.org
> Subject: [mapserver-users] WMS GetFeatureInfo beyond scale
> 
> Hi list,
> 
> I upgraded my UMN MapServer from version 5.0.2 to 5.4.0. Now I've got the following problem:
> 
> For instance I am using a group of layers:
> 
>  LAYER
> 	NAME "A_a"	
> 	GROUP "A"
> ...
>  LAYER
> 	NAME "A_b"	
> 	GROUP "A"
> ...
>  LAYER
> 	NAME "A_c"	
> 	GROUP "A"
> ...
> A_a, A_b and A_c are all the same data but represented at different scales. So e.g. at 1:100000 A_a becomes invisible and A_b becomes visible. 
> 
> But when I do a GetFeatureInfo request on UMN Mapserver in this case for query_layers=A
> I get back 3 responses (for A_a, A_b and A_c), but I would hope for only 1 response. 
> 
> It seem as if this is a well known problem (http://trac.osgeo.org/mapserver/ticket/842) 
> 
> What can I do beside upgrading on version 6.0 as soon as it's available?
> 
> Any advice is welcome! Thanks in advance,
> Nina
> 
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