Norman Barker wrote:
Hi,

after my posting a couple of weeks back, it seems I will have to write the Web Map Server and Web Feature
Server Generators :-) , should be quite a nice challenge.

I'm sorry, but I failed to notice your first post. Yes, Geoid has been quiet for a long time: unfortunately I hadn't the opportunity to work on something useful for that project as I intended.


Anyway, the infrastructure is there, so, you might consider joining the project.... I won't object :)


I guess it would be best to make these as generic as possible for future use.
The OGC specs allow either HTTP Key Value Pair requests, or XML posted to the WFS and WMS servers (see
http://www.opengis.org).


The basic flow is
1) User requests a capabilities XML document from the WFS or WMS
2) User makes a request to the WFS or WMS and the results is returned
which is either GML (xml) (in the case of the WFS), or an image in the case of a WMS

I think Cocoon may come in handy when WFS is used: to style it with SLD, to manipulate it with XSL, to translate into SVG, to translate SVG into images (see Batik)... but when it comes to WMS I have the feeling that the capabilities of Cocoon are sort of an overkill.
As a case in point, I've used MapServer (acting as WMS server) with Cocoon, and it was just the matter of calling the MapServer's CGI and passing request parameters: I didn't need a generator for that.



I guess we will want the generator to start the pipeline as a middle stage on the return from the WFS or WMS to the user,
so that this data can be styled to SVG, or html, or in my case a different version of XML for the user.

Have you considered using SLD for WFS styling ?

Regards,

---------------------------
     Luca Morandini
   [EMAIL PROTECTED]
http://www.lucamorandini.it
---------------------------


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