The OWS context stuff (I don't think it is an official spec yet) seems like it fits. I think it hits all the requirements... except for feature count. I am not sure if there is some notion of extensible parameters.
The schema is here: http://www.ogcnetwork.net/schemas/owc/ It does have the benefit of being a "standard", and I think there is already some client support around for it around: openlayers, udig, gvsig?, etc... Worth checking out perhaps. -Justin Andrea Aime wrote: > Hi, > there is a user on the ml asking about how he could get > the extents of the features rendered by a GetMap with a filter. > The answer is that this is not trivial, because the filter > would have to be matched with the eventual filter embedded > in the SLD, with the scale related rules, and so on. > Long story short, only the WMS knows what was actually rendered. > > I was wondering about a WMS output format that instead of > depicting a map, describes it. An xml document containing > the layer names, the feature count and bounds for each layer, > maybe a link to the SLD that was used for a specific layer, > the extra filter applied, the current scale. > > Could be useful for this common use case (which will stay > common until WFS can really be used in anger to draw many > features in a browser), and also could be useful for debugging > (as the client and the server don't usually compute the > same scale, or to realize you are not using the style you > thought you were using, or to see a filter is not doing > what you intended it to do). > > Opinions? > Cheers > Andrea > -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Geoserver-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-devel
