On Mon, May 28, 2012 at 11:54 AM, Per Reinholdt <[email protected]>wrote:
> Union with WPS
> Hi****
>
> I need to union the geometries from a WFS query and want to do it with a
> single
> request.
> I just started to learn the WPS on Geoserver but can´t find a good
> solution to solve it in one step.
>
> ****
>
> I understand that I get WFS response as a WFS collection. ** **
>
> The problem is that I can´t use a reference to the WFS as input in a JTS:
> Union process since the WFS-collection is not allowed.****
>
>
>
You have to bridge the feature collection world and the geometries world
using the collectGeometries process.
It can be done in a single call, just need to use chaining (you can use the
wps demo builder to setup a chained
request, have one of the parameters be of type "subprocess").
Mind though, the collectGeometries proces will have to load all the
geometries in memory, so don't use it
against a very large amount of geometries.
Cheers
Andrea
--
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
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