Hi, This is from an earlier email exchange. It may help. Look for « Geopackage file data loss issue » in the mailing list.
> The answer is there: > https://gdal.org/drivers/raster/gpkg.html#tile-formats > > For Byte input (that isn't recognized as to be used by the tiled > gridded coverage data), the default tile format will use JPEG lossy > compression for tiles with a fully opaque channel. > > -co TILE_FORMAT=PNG will use lossless compression > > GeoPackage raster aim was initially for visualisation purposes, hence > this default. The more analytic side was a later addition to the > format, and actually an extension > > Even Nicolas Cadieux https://gitlab.com/njacadieux > Le 6 avr. 2021 à 20:18, David Strip <qgis-u...@stripfamily.net> a écrit : > Are raster layers saved to geopackage compressed? I have a geopackage with > two raster layers in it and they appear to be uncompressed. Both layers are > about 11K x 14. One is byte, the other is float32 and the geopackage is > around 500M, consistent with no compression. > I tried doing an "export" of the layer to a geopackage (as opposed to > dragging it into the geopackage in the file browser pane), but the only > available profile under Create Options is "default". Do I need to type > compression options explicitly? > > Thanks > David _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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