Hi Jon-Paul,
Can you please explain a bit more about your requirement. i will try to
think of possibility. Geoserver has been enhanced a lot since version 2.x.
You can check out presentation by Andrea Aime from OpenGeo. It has really
very useful information regarding SLD.
http://2010.foss4g.org/presentations_show.php?id=3588
Regards,
Hari.
On Wed, May 11, 2011 at 4:15 PM, Jon-Paul Dobson <[email protected]>wrote:
> Hi Harikumar,
>
> Thanks for the detailed answer. The problem is that the style I want to use
> isn't known until run-time, so it would not be possible to use pre-defined
> styles. I want to for example change a symbols colour based on a database
> field value which can change over time. This means it wouldn't be be
> possible to use a fixed SLD file. Do you know if it's possible to do this at
> all? Is there a way to pass the SLD XML directly to GeoServer without
> needing to use file?
>
> Best regards,
> Jon-Paul.
>
> On Wed, May 11, 2011 at 11:01 AM, Harikumar Reddy <[email protected]>wrote:
>
>> Hi,
>>
>> I may not provide more insight than given below (provided information
>> whatever is known to me)., but i hope you will get clarity how to implement
>> dynamic sld for gis layers for multi lingual webgis applications.
>>
>> We can assign more than one styles to a GIS layer (but default SLD will be
>> selected during geoserver layers configuration..for ex:- polygon for polygon
>> layers, line for road layers, or point for point features). You may write
>> need to write code in the program similar to given below.
>>
>> Note: even though default SLD is configured in Geoserver, required sld to
>> be applied should be present in geoserver. naming of such sld like given
>> below will not confuse developers while coding.
>>
>> The slds respective to each layer as follows.
>>
>> *layer*
>>
>> *sld*
>>
>> * *
>>
>> *English*
>>
>> *Hindi
>> *
>>
>>
>> gis:gis_sea
>>
>> gis_sea
>>
>> gis:gis_country
>>
>> gis_country
>>
>> gis:gis_footprint
>>
>> gis_footprint
>>
>> gis:gis_buildings
>>
>> gis_buildings
>>
>>
>>
>> gis:gis_city
>>
>> gis_city_en
>>
>> gis_city_hnd
>>
>> gis:gis_district
>>
>> gis_district_en
>>
>> gis_district_hnd
>>
>> gis:gis_towns
>>
>> gis_towns_en
>>
>> gis_towns_hnd
>>
>> gis:gis_roads
>>
>> gis_roads_en
>>
>> gis_roads_hnd
>>
>> if require, pass specific sld's as in order to apply dynamic styles to the
>> respective layer locale selected.
>>
>> Eq 1 :
>> ....
>> ....
>> map = new OpenLayers.Map ("map",options);
>> var layers ='gis:gis_ind,'+
>> 'gis_footprint,'+
>> 'gms_landmarks,'+
>> 'gis:gis_towns,'+
>> 'gis:gis_roads,'+
>> 'gms:gms_point_of_interest';
>> var slds ='gis_ind,' +
>> 'gis_footprint,'+
>> 'gms_landmarks,'+
>> 'gis_towns_'+ locale +','+
>> 'gis_roads_'+ locale +','+
>> 'gms_POI_'+ locale;
>> var layer = new OpenLayers.Layer.WMS( "ind WMS", wmsUrl,{
>> layers: layers,
>> styles: slds,
>> srs: 'EPSG:4326',format: 'image/png'},{'attribution': '© 2009
>> Mapview'},{buffer: 0});
>> map.addLayer( layer );
>>
>> Eq 2 :
>> ....
>> ....
>> map = new OpenLayers.Map ("map",options);
>> var layer1 = new OpenLayers.Layer.WMS( "Layer1", wmsUrl,{
>> layers: 'gis:gis_ind',
>> styles: 'gis_ind',
>> srs: 'EPSG:4326',format: 'image/png'},{'attribution': '© 2009
>> Mapview'},{buffer: 0});
>> var layer2 = new OpenLayers.Layer.WMS( "Layer2", wmsUrl,{
>> layers: 'gis:gis_towns',
>> styles: 'gis_towns_'+ locale,
>> srs: 'EPSG:4326',format: 'image/png'},{'attribution': '© 2009
>> Mapview'},{buffer: 0});
>> map.addLayers( [layer1, layer2] );
>> In this example, the locale javascript object gets the respective language
>> as 'en' or 'ar' and applies language specific style to the layer.
>>
>>
>> @ Hari
>>
>>
>> On Wed, May 11, 2011 at 2:13 PM, Jon-Paul Dobson
>> <[email protected]>wrote:
>>
>>> Hi,
>>>
>>> Is there anyway to change layer styles on-the-fly other than to alter the
>>> .SLD xml file? In our application I want to allow users to have the ability
>>> to set personal layer styles e.g. colour, symbol etc.Is this possible at
>>> all?
>>>
>>> If the only way to change styles is to alter the .SLD file, then this
>>> means that layer styles must be set at the global level and personal
>>> preferences per user would not be possible.
>>>
>>> Regards,
>>> Jon-Paul.
>>>
>>>
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>>
>
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