[Geoserver-devel] [udig-devel] general purpose client to WFS 1.1

[Chris Holmes]

Jody Garnett wrote:
> Justin (CCed) on this email is part of OWS-4 project, and has ported the 
> code in question over to GeoTools trunk.
And he's also in the process of using it for parsing GML 3.1.1 (though 
only level 0), as we have to in order to do transactions.

If you want more information on the parser, see: 
http://udig.refractions.net/confluence/display/OWS3/GTXML  We should 
probably port those docs over to geotools, since the code lives there now.

And the steering document is at: 
http://docs.codehaus.org/download/attachments/16158/GTSteering.pdf

> 
> If possible it would be great to see your work made public as a 
> GeoServer community module.
This would be great.  We're working to make GeoServer more of a 
platform, so that one can install individual plug-ins (WMS, WFS, WCS) 
and not have to go whole hog.  Developing against it as a platform gets 
you geotools and jts libraries.

So it'd be cool to include the clipping service as a plug-in to 
GeoServer.  If you're interested let us know and we can point you at how 
to do it.

best regards,

Chris


> Jody
>> Jody,
>>   Thank for your reply. I am a PhD student at George Mason University. 
>> We are part of OWS-4 testbed. We are resposible for creating a 
>> "clipping service" and wrap it as a WPS (Web Processing Service). We 
>> have already created the basic version of the service which works with 
>> WFS 1.0 using geotools and JTS. But at some point in the future we 
>> have to upgrade it to WFS 1.1.
>> Can you send send me the links to the schema parser you are talking 
>> about? If I can contribute to your project somehow, please let me 
>> know. Can I get the geotools steering document? Any pointers on how to 
>> start with UDIG source code would be helpful. Thank you.
>>
>> Upendra
>>
>> */Jody Garnett <jgarnett at refractions.net>/* wrote:
>>
>>     Upendra wrote:
>>     > Hello everybody,
>>     > I am new to UDIG. I want to use udig with WFS. I was able to use it
>>     > with WFS 1.0, but not with WFS 1.1. My question:- Is it even
>>     possible
>>     > to develop general purpose client for any WFS 1.1?
>>     Of course. We did one for the OWS-3 project that you can take a
>>     look at,
>>     we did not roll it out into the codebase as we only managed to parse
>>     points as far as geometry went. But now geotools has picked up the
>>     work
>>     so we could do better - just need time / money / volunteers
>>     (preferably
>>     all three)
>>     > What if my WFS schema is very complicated?
>>     This is why we had to develop our own parser (our WFS 1.0 support is
>>     done with the generation 3 geotools parser, the WFS 1.1 mentioned
>>     above
>>     using generation 4). The feature model used has also been a blocker,
>>     but that has gotten some research attention since this time last
>>     year,
>>     now we need some development time to bring it home. Currently the
>>     ground
>>     work will be ready to do this for next year, but we make work on
>>     funding
>>     for that :-)
>>
>>     I got a geotools steering document to present to their project
>>     management committee about that.
>>     > In case of WFS 1.0 schemas are usually very simple, one just has to
>>     > look at a geometry field in the schema and use it for rendering.
>>     What
>>     > if there are multiple geometry fields or if there is topological
>>     > complex instead of a geometry field? Is it possible to create a
>>     > general purpose client without knowing the WFS application schema
>>     > beforehand? Any answers will be greatly appreciated. Thank you.
>>     Sure, and we do this. So far we have been limited by data sources
>>     presenting interesting content (so our current tools have not been
>>     tested with more then one geometry field per feature etc...).
>>
>>     Um I have lots of links to this work ... what are you interested in?
>>     Anything beyond it can be done?
>>
>>     Cheers,
>>     Jody
>>
>>     _______________________________________________
>>     User-friendly Desktop Internet GIS (uDig)
>>     http://udig.refractions.net
>>     http://lists.refractions.net/mailman/listinfo/udig-devel
>>
>>
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> 
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-- 
Chris Holmes
The Open Planning Project
http://topp.openplans.org
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