Hi David,
Thanks for this suggestion. This looks more promising. I'm still not sure if
it offers quite the flexibility that I would like though. It's a shame you
don't seem able to pass raw SLD xml in the URL.
Best regards,
Jon-Paul.
On Wed, May 11, 2011 at 1:28 PM, David Winslow <[email protected]> wrote:
> If you don't mind having your styles reliant on nonstandard functionality,
> then you could use parameter substitution. See the documentation:
>
>
> http://docs.geoserver.org/stable/en/user/styling/sld-extensions/substitution.html
>
> --
> David Winslow
> OpenGeo - http://opengeo.org/
>
>
> On Wed, May 11, 2011 at 8:00 AM, Jon-Paul Dobson <[email protected]>wrote:
>
>> Hi Hari,
>>
>> Th ultimate aim is to be able to colour layer symbols on-the-fly. So for
>> example I may have a layer based on a Shape file for which the symbols are
>> circles. I need to be able to change the colour of each circle
>> programmatically. I do not want to use predefined styles for this as there
>> are potentially any number of colours to choose from. I also do not want to
>> alter a single SLD file as the colours may be different for each user that
>> is logged into the application. If I altered the SLD file then every user
>> would see the same colours.
>>
>> Any ideas about this? Is this even possible?
>>
>> I guess you could also create a temporary SLD file, populate
>> appropriately, assign the layer to this SLD file, then delete the temporary
>> SLD file but I think there would be performance problems with this and it
>> seems a bit hacky.
>>
>> Ideally there should be a way to pass the raw SLD XML directly to
>> geoserver without needing to save the SLD to a file but I don't think this
>> is possible. This is how ESRI ArcIMS use to work using it's AXL.
>>
>> I'll certainly check out the link you provided so thanks for that.
>>
>> Regards,
>> Jon-Paul.
>>
>>
>> On Wed, May 11, 2011 at 12:39 PM, Harikumar Reddy <[email protected]>wrote:
>>
>>> 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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