That is the expected behaviour with a paletted image, the values of two neighbouring pixels have no relationship to each other so any form of averaging is going to produce a wrong result.
You could convert them to be RGB images using GDAL (pct2rgb.py) but they will still look a bit mushy when you average them. Ian On Sat, 18 Jan 2020 at 17:11, Russ Hore <r...@russ-hore.co.uk> wrote: > I have an issue if I set the WMS default interpolation to anything other > than “Nearest neighbour” and zoom in. > > OS : Ubuntu 19.01 > > > If I set the interpolation to Bilinear or Bicubic, at the same zoom level > I see; > > > > The back end tiles are generated from TIFF files using; > > gdalbuildvrt -a_srs EPSG:27700 outfile.vrt *tif > gdal_translate -of GTiff -r nearest -a_srs EPSG:27700 outfile.vrt > mergedfile.tif > > > > _______________________________________________ > Geoserver-users mailing list > > Please make sure you read the following two resources before posting to > this list: > - Earning your support instead of buying it, but Ian Turton: > http://www.ianturton.com/talks/foss4g.html#/ > - The GeoServer user list posting guidelines: > http://geoserver.org/comm/userlist-guidelines.html > > If you want to request a feature or an improvement, also see this: > https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer > > > Geoserver-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-users > -- Ian Turton
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
