On Thu, Jun 8, 2023 at 11:04 PM Julien Robitaille <robitail...@ogsl.ca>
wrote:

> Hello!
> I am trying to figure out if what I want to do is possible. I have a
> raster layer of surface current data. Since some of the data overlaps the
> land, I want to be able to filter out the pixels that appear on land. I
> thought of doing it by adding to our geoserver a vector polygon vector
> layer representing the water bodies.
> And I would like to be able to intersect my raster layer with that vector
> layer. Is this possible to perform, maybe with the cross-layer filtering
> <https://docs.geoserver.org/2.22.x/en/user/extensions/querylayer/index.html#wms-examples>plugin?
> The thing is that I am not sure if technically it is possible to filter a
> raster layer based on a vector.
>

What you're trying to do is not understood as filtering in GeoServer, but
clipping.
You can provide a clip geometry inline in the WMS request, using the "clip"
vendor parameter:
https://docs.geoserver.org/latest/en/user/services/wms/vendor.html#clip

Works both against rasters and vectors. The polygon must be simple enough
to fit in the URL

Regards
Andrea

==

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