> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Jochen Topf > Sent: 25 September, 2008 9:49 AM > To: Markus Spring > Cc: Mapserver-users > Subject: Re: [mapserver-users] How to pimp WMS meta information? > > On Tue, Sep 16, 2008 at 07:16:03AM +0200, Markus Spring wrote: > > trying to set up a multi-map service based WMS mapservices and > > OpenLayers, I would like to retrieve user-defined meta information > > from a map via the GetCapabilities request. > > > > For example, if I define > > > > METADATA > > WMS_TITLE "Palliativstationen" > > WMS_ONLINERESOURCE "http://gis.local/wms/palliativ"; > > WMS_SRS "epsg:31468" > > > > WMS_SHOW_QUERY_IN "large_popup" > > > > END > > > > I would like to retrieve the value "large_popup" of > WMS_SHOW_QUERY_IN > > through the GetCapabilities call. The background idea is that this > > information could be used by my application but should not > harm other > > people's use of the WMS service. > > > > Is there any viable way to accomplish this with a mapserver > based WMS service? > > I have used the WMS keywords on a WMS layer to add special > infos only needed for my application. Not the cleanest > approach, because other applications will, of course, also > see those special keywords you put in, but as a workaround it is ok. > > Would be nice if there was an "official" way to do this, though. >
Out of the box, MapServer will return a well-formed, valid XML document which obeys the WMS standard. Having said this, you could use mapscript WxS (http://mapserver.gis.umn.edu/docs/howto/wxs_mapscript) to, on GetCapabilities, intercept the request/response mechanism and write out a modified GetCapbilities XML document, adding in your own XML elements and definitions, i.e.: <Layer> <Name>foo</Name> <Title>bar</Title> <MyProperty name="WMS_SHOW_QUERY_IN">large_popup</MyProperty> ... This would work, with the assumptions that: 1./ a WMS Capabilities parser which is doing DTD checking would choke on this, as it is not part of the WMS DTD 2./ if there is no DTD checking, the Capabilities will be processed, only 'aware' clients would know what to do with this info Of course, if you want to be to-spec 100%, there are ways to extend DTDs with inline ENTITY's, etc. :) Hope this helps. ..Tom _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
