Hi Geoserver offers three options for raster rendering: nearest neighbor, bilinear, bicubic. I made some tests with a single band (black and white) geotiff with internal overviews.
Nearest neighbor: Rendering when zoomed out is as expected not very nice. https://drive.google.com/file/d/18MXxA67lmfJFOmM_7qtRf9XUPploSamS/view?usp=sharing Bilinear: It looks like nearest neighbor when zoomed out (which irritates me a bit). https://drive.google.com/file/d/1lGSxUC4VNEi5NpVoV7Q1Ury2vif3tf5I/view?usp=sharing Bicubic: This is where i get black dots when zoomed out https://drive.google.com/file/d/1iODH8-gEGGhBNfckQZ7XnXMnqyZDSVGW/view?usp=sharing When I use the image pyramid plugin to publish the file and preprocess the file with gdal_retile I get much better rendering results with all three methods. Bicubic example: https://drive.google.com/file/d/1Fjml6_FckcuGSVwdRglT30HhzLe_BWaT/view?usp=sharing Is there a way to achieve the same rendering quality without preprocessing the data (or using the image pyramid plugin respectively)? Original file can be found here: https://drive.google.com/file/d/19pG6ZCuq1V1WTCr8lb3bMqWCwaBWd2aT/view?usp=sharing best regards Stefan
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