[OpenLayers-Users] Querying multiple layers

[ajohnson at ecotropolis.com]

Alexandre,

Thanks! That worked great.

> ajohnson at ecotropolis.com wrote:
>> I have a map with multiple layers (view at
>> http://ecotropolis.com/maps/NorthAmericaWatershed.html) and I want to be
>> able to click on a feature of any of the maps and retrieve data from the
>> WMS (I'm using Geoserver).
>>
>> I initially got it working using the following line in
>> getFullRequestString:
>>
>>  QUERY_LAYERS: map.layers[1].params.LAYERS,
>>
>> This works with one map. I tried extending it to two layers:
>>
>>
>>  QUERY_LAYERS: map.layers[1].params.LAYERS, map.layers[2].params.LAYERS,
>>
>
> Have you tried something like this :
>
> If you use Layer.WMS :
>
> QUERY_LAYERS: map.layers[1].params.LAYERS + "," +
> map.layers[2].params.LAYERS,
>
>
> If you use Layer.MapServer:
>
> QUERY_LAYERS: map.layers[1].params.LAYERS + " " +
> map.layers[2].params.LAYERS,
>
>
> Alexandre
>
>> but that gave me an error. I got it to run using the following:
>>
>>   QUERY_LAYERS: wms.params.LAYERS,
>>
>> Which gives me data, but it is generic for the entire layer to which the
>> selected feature belongs instead of specific to a particular element.
>> How
>> can I set this up to query multiple layers and return information
>> specific
>> to the selected feature?
>>
>> Regards,
>>
>> Amy
>> _______________________________________________
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>> Users at openlayers.org
>> http://openlayers.org/mailman/listinfo/users
>>
>
>
> --
> Alexandre Dubé
> Mapgears
> www.mapgears.com
>
>