[mapserver-users] Dynamic LabelItem

[Fawcett, David]

Searching revealed that it is possible to change a labelitem by
substitution.  

Have you had a look at this page?
http://mapserver.org/cgi/controls.html

Scroll down to the header 'Using MapServer version >=5'

In the below example, the layer name is 'aqiAreas' and I am changing the
column to be used to 'NAMESAFE'.  

I am referencing the layer by name and then after the '=' sign, you put
the property that you want to change (labelitem), a space, and then the
name of the new column to be used.  


http://localhost/cgi-bin/mapserv.exe?map=/ms4w/apps/imap/labelitem-test.
map&mode=map&map.layer[aqiAreas]=labelitem%20NAMESAFE


David.

PS.  If this question was about whether OpenLayers passes on your custom
URL vars to MapServer in a WMS call, I am not so sure about that.  I
believe that more recent versions to, but that would be a question for
the OpenLayers list.


-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of stretch
Sent: Monday, June 29, 2009 1:08 PM
To: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Dynamic LabelItem



Anyone have any ideas?

stretch wrote:
> 
> Hi All
> 
> We are using mapserv cgi to generate WMS and access via openlayers.
> 
> Searching reveals that it is not possible to dynamically change the 
> labelitem by substitution i.e LABELITEM='%LABELFIELD%'
> 
> Is it possible however to do it via 
> &map_layername_labelitem="labelfield"
> in your url, or any other such method. Any help would be really
> appreciated, because otherwise it means creating different layers for
each
> labelling option.
> 
> Thanks
> Andrew
> 

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