Hello. I am GIS Newbie. I am currently publishing satellite images as layers in geotiff format. And I am requesting it in wms and displaying it on openlayers. I want to filter by giving a range of pixel values. For example, if the layer has values from 1 to 1000, I would like to filter values from 50 to 200. I tried using the cql filter, but the result was not displayed. Is there a way to filter raster data using geoserver? Is there any good way to do this? Thank you.
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