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Looks like mosaic.tif is compressed while smoothing.tif is not: Image Structure Metadata: COMPRESSION=LZW I don't have any experience with orfeo, but it seems you can pass GDAL creation options to create compressed outputs by using an "extended filename", see: https://www.orfeo-toolbox.org/CookBook-6.6.1/AdvancedUse.html#examples https://gdal.org/...


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Georeference by coordinates in polygon units rather than geographic. That is, (0,0) for the polygon in the bottom left corner, etc. You'll need a lot of points and a non linear transform function, which is available in QGIS. Then take the value of each polygon as z and its x,y coordinate as an x,y,z ungridded dataset. Grid the x,y,z data to a raster and ...


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