[OpenLayers-Users] Perhaps a UMN Question

[adams]

Hanno,

looks like your filter

EXPRESSION ''

leads to no objects for this layer,I guess : Now your filter looks for 
all objects with the value '' in the column 'bfs'.

Try

EXPRESSION /./

for as single class layer first, to ensure that your filter gets some 
objetcs.

...and indeed: Its a question to put better on the mapserver-list,

regards, Till

Rahn Hanno (rahn) wrote:
>
> Hello list,
>
> I have a little question. Perhaps it is a UMN Mapserver Mapfile 
> question, but perhaps you can help me a little bit.
>
> I try to show a WMS layer in OpenLayers. For this I made a mapfile. In 
> this mapfile I realise a layer like this:
>
> LAYER
>     NAME 'symbol'
>     TYPE POLYGON
>    
>     CONNECTIONTYPE postgis
>     CONNECTION 'host=*** user=*** password=*** dbname=***'
>     DATA 'the_geom FROM gines_geo_2007 using unique oid using srid 21781'
>        
>         METADATA
>                 "wms_title" "WMS symbol"
>         END
>        
>         PROJECTION
>                 "init=epsg:21781"
>         END    
>              
>     STATUS ON
>                
>     CLASSITEM 'bfs'
>     CLASS
>       NAME ''
>       EXPRESSION ''
>       STYLE
>         SYMBOL 0
>         SIZE 3
>                 COLOR 63 153 94
>         OUTLINECOLOR 170 85 0
>        END
>     END
> END
>
> All other layers in this mapfile works, so I think the mapfile header 
> is correct.
>
> And now I try to test the layer in my OpenLayers. For this I try this:
>
> var urlArray =["http://***/cgi-bin/mapserv.exe?", 
> "_http://***/cgi-bin/mapserv.exe?_"];
> var mapFile2 = "../htdocs/"+pfad+"/Maps/Hintergrund.map";
>
> var symbolLayer = new OpenLayers.Layer.WMS("Symbollayer", urlArray, 
> {map:mapFile2, layers:"symbol", transparent:"true"},{singleTile: true, 
> ratio:1});
>
> symbolLayer.setIsBaseLayer(false);     
> map.addLayer(symbolLayer);
>
> But I see nothing. In The Layerswitcher the layer is shown, but I see 
> no map. All other layers work, so that I think the extent and so on is 
> right. I think this is a UMN problem, but perhaps somebody has an idea 
> here? If I try to show the GetMap request directly in the Browser it 
> does'nt work, but I get no error message or message that something is 
> wrong.
>
> Hope that somebody can help me.
>
> Greetings
> Hanno
>
>
>  
>  
>
> ------------------------------------------------------------------------
>
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>   

-- 
 
---------------------------------------------------------
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Germany

Till Adams
Geschäftsführung

Tel: +49 (0)228 / 962 899-52
Fax: +49 (0)228 / 962 899-57
adams at terrestris.de http://www.terrestris.de
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vertreten durch:
Hinrich Paulsen, Till Adams

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