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2007.07.05 14:26 "Re: 16-Bit-Per-Channel Lossless Compression", by Andrey Kiselev
On Thu, Jul 05, 2007 at 03:45:47PM +0200, Joris wrote: > >$ gdal_translate -co "COMPRESS=ZIP" -co "PREDICTOR=2" -co "TILED=YES" > >-co "BLOCKXSIZE=256" -co "INTERLEAVE=BAND" IMG_2948.Flowers1.tif > >IMG_2948.Flowers1-zip2-tiled-sep.tif > > As I don't speak gdalese, what size do tiles have in your test? It's > my opinion ideally efficient tiles over a broad range of compression > modes, that fit workflow on today's machines best, are in the order of > about 1 to 3 megabyte, not the legacy 8 kilobyte (uncompressed, of > course). I believe that for some compression modes, tile size does > have a considerable impact on efficienty. It is 256x256. I have tried bigger tiles but without any gain in compression ratio. Best regards, Andrey -- Andrey V. Kiselev ICQ# 26871517