Sounds like a great addition to me to me. Is the plan to only support the
time/elevation parameters in GET requests like WMS or also handled via
POST? I ask because POST request parsing often gets overlooked (like with
viewParams).
On Tue, Jul 3, 2012 at 4:17 AM, Andrea Aime <[email protected]>wrote:
> Hi,
> so far in GeoServer history we ported a number of common and useful WFS
> parameters towards the WMS protocol as vendor extensions: filtering
> and paging are two examples.
>
> I would like to propose that, for once, we do the operation in the
> opposite direction,
> have WFS GET requests respond to the TIME/ELEVATION parameters as well.
>
> The idea is to facilitate the development of client applications using
> data with
> time and elevation, applications that are using primarily WMS but that do
> occasionally require wfs to pull in raw vector data, without the need to
> get extra knowledge
> about how thing are configured time/elevation wise, but just keep on using
> the
> same parameters as WMS in the requests.
>
> I don't have a plan to expose the time/elevation metadata in the WFS
> capabilities
> though (just like we don't expose the attribute list for CQL filtering in
> WMS caps,
> to draw a parallel). The WFS capabilities document does not allow for
> vendor
> extensions on the feature types description regardless.
>
> The behavior would mimic one to one the WMS one, so that you get exactly
> the same data back when doing requests.
> In particular, as already discussed in the past, we want to expose 4D data
> having a time offset being the 4th dimension, and allow for slicing on a
> time
> interval when a configuration flag is raised: the WFS would have to behave
> the same way to ensure consistency between the two enviroments, with the
> geometry cut and the Z interpolated to represent the elevation of the
> linestring
> subset in the specified time interval
>
> Opinions?
>
> Cheers
> Andrea
>
> --
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
> mob: +39 339 8844549
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
>
>
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--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.
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