[OpenLayers-Dev] SLD support against ArcGIS Server

Andrea Aime aaime at opengeo.org
Thu Jul 2 08:35:28 EDT 2009

bartvde at osgis.nl ha scritto:
> Hi list,
> I've justed opened up ticket 2166 [1] with a patch to have
> OpenLayers.Format.SLD support ArcGIS Server. The problem here is that
> ArcGIS server needs the namespaces to be defined on the root node
> currently, and it also cannot work with sld as the default namespace only
> (it needs xmlns:sld). After this patch OpenLayers still produces a valid
> SLD XML, and I've verified it still works okay against both Mapserver and
> Geoserver.
> Would people be generally supportive of including this patch for the sake
> of supporting ESRI? I am interested to hear opinions.
> Also, something which is a bit strange in their implementation IMHO is
> that one needs to add a <Name> tag to the UserStyle, and one needs to use
> this same name in the STYLES parameter of the GetMap request. AFAIK the
> spec says that SLD overrides the LAYERS and STYLES parameter of the
> request. But this has nothing to do with Format.SLD, but is an advice to
> people trying to get SLD to work against ArcGIS Server.

Hmmm... my understanding is that &sld can work in two ways (in the SLD
1.0 specification):
- as a layer/styles replacement. In this case you don't specify those
   two and your sld is filledn with named/user layers and user styles.
- library mode, which is not very clearly defined, but allows you
   treat the sld as a style library. The map will only draw the layers
   specified in LAYERS, using the default style in the sld for that
   layer if present, the default style of the server otherwise,
   and if you specify STYLES, it will look up the style name inside
   the correspondent UserLayer definition. As a library, UserLayer
   will contain one or more UserStyle definitions, and one of them
   can be marked as a default


Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.

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