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I use the ImageMosaicJDBC plugin to connect to an Oracle raster table. Maybe someone can clarify some things about the interpolation settings. There are multiple location where I can define the interpolation which is confusing to me:

  • gdal_translate
    gdal_translate -of georaster...
    co GENPYRAMID=BILINEAR ^
  • .xml file for ImageMosaicJDBC
    scaleop interpolation="1"
  • GeoServer Layer setting
    Default interpolation setting=xx

The problem I have: I get a black/grey scaled border around my raster layer when I open it via WMS and I used the setting scaleop interpolation="2" or "3" in my xml.

enter image description here

Btw. I don't understand how that .xml file of ImageMosaicJDBC works. Is it only accessed once when I create a new data store? Or is it accessed every time the layer is accessed?

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    I have the same problem with Geoserver 1.12 (since Geoserver 1.10). The border widens when I zoom in. From a certain zoom level, the whole picture is only filled with the border color. Is there a fix for this issue? – G. Fiedler Jan 20 '18 at 19:46

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