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
--
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Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
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phone: +39 0584 962313
fax: +39 0584 962313
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