[OSGeo-Discuss] WMS and layer stacking.

[P Kishor]

On Wed, Sep 15, 2010 at 4:40 PM, Christopher Schmidt
<crschmidt at crschmidt.net> wrote:
> On Wed, Sep 15, 2010 at 04:33:04PM +0200, P Kishor wrote:
>> On Wed, Sep 15, 2010 at 3:59 PM, Ian Turton <ijturton at gmail.com> wrote:
>> > On Tue, Sep 14, 2010 at 2:59 PM, Bob Basques
>> > <Bob.Basques at ci.stpaul.mn.us> wrote:
>> >> All,
>> >>
>> >> does anyone know if there is a layer hierarchy setting in the WMS service,
>> >> which layers are on top of which layers (Z value=)?
>> >>
>> >
>> > There is an "opaque" hint in the capabilities document that suggests
>> > that the layer should be a base layer. Other than that the layers are
>> > just drawn in the order the client requests them and there is no
>> > implied ordering from the capabilities file. For example GeoServer
>> > returns the layers in alphabetical order by namespace then layer name.
>> >
>>
>>
>> I was quite under the belief that the layers were requested, delivered
>> and drawn in the order they appeared in the map.addLayers([array])
>> invocation.
>
> You're discussing an implementation (OpenLayers), with multiple requests to
> the WMS server being stacked in the client.
>
> This discussion is about the WMS "API".


dang it... you are so right. Show how much my mind is consumed with OL nowadays.


>
> WMS draws layers from bottom to top, from the beginning of the list in the
> 'layers' param to the end.
>
>  layers=foo,bar,baz
>
> will put foo first, then bar, then baz.

Yes indeed.


>
> -- Chris
>
>>
>> > Ian
>> > --
>> > Ian Turton
>> > _______________________________________________
>> > Discuss mailing list
>> > Discuss at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/discuss
>> >
>>
>>
>




-- 
Puneet Kishor http://www.punkish.org
Carbon Model http://carbonmodel.org
Charter Member, Open Source Geospatial Foundation http://www.osgeo.org
Science Commons Fellow, http://sciencecommons.org/about/whoweare/kishor
Nelson Institute, UW-Madison http://www.nelson.wisc.edu
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