So these need to be defined as parameters to the RenderingTransformation
process, and then specified in the SLD with values provided by calls to the
"env" function?
Hmm... I think I like the invertQuery way better - more explicit, and fewer
lines of code for users to screw up.
I can see that having access to rendering parameters in the SLD could be
very useful, however.
On Tue, Feb 28, 2012 at 1:41 PM, Andrea Aime
<[email protected]>wrote:
> On Thu, Feb 23, 2012 at 12:53 AM, Martin Davis <[email protected]> wrote:
> > I'm working on a GSProcess which is being used as a
> RenderingTransformation,
> > to produce a GridCoverage output. I want to create the output grid with
> the
> > size of the image requested. To do this I need to keep the GridGeometry
> > provided in the invertQuery() method for later use in the execute()
> method.
>
> That is a way, but not a nice one as you noticed.
>
> If you look at how the raster georeferencing process
> is used in geometry transformations (SF metro project) you'll see that
> on trunk GeoServer sets a few extra enviroment variables that you
> can grab with the "env" function, including the width and height of the
> output image.
>
> Here are the params:
>
> // setup some SLD variable substitution environment used by
> rendering transformations
> EnvFunction.setLocalValue("wms_bbox",
> mapContent.getRenderingArea());
> EnvFunction.setLocalValue("wms_crs",
> mapContent.getRenderingArea().getCoordinateReferenceSystem());
> EnvFunction.setLocalValue("wms_srs",
> mapContent.getRequest().getSRS());
> EnvFunction.setLocalValue("wms_width", mapContent.getMapWidth());
> EnvFunction.setLocalValue("wms_height", mapContent.getMapHeight());
>
> Hope this helps
>
> 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
>
> -------------------------------------------------------
>
--
Martin Davis
OpenGeo - http://opengeo.org
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