This could be what I'm looking for. Thanks. I'll look into this.
Regards,
Jon-Paul.
On Wed, May 11, 2011 at 1:46 PM, David Winslow <[email protected]> wrote:
> You can do that too; GeoServer accepts a parameter named SLD_BODY in WMS
> requests. It is a bit problematic for web browsers as most have a limit on
> the length of URLs and SLD tends to be pretty verbose. GeoServer does allow
> POSTed GetMap requests, but not all browsers can handle displaying the
> results of a form submission as OpenLayers map tiles (most recent ones can.)
>
>
> See
> http://dev.openlayers.org/releases/OpenLayers-2.10/examples/WMSPost.htmlfor
> an example.
>
> --
> David Winslow
> OpenGeo - http://opengeo.org/
>
>
> On Wed, May 11, 2011 at 8:42 AM, Jon-Paul Dobson <[email protected]>wrote:
>
>> 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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>>>> What every C/C++ and Fortran developer should know.
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>>>>
>>>
>>
>
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