[gdal-dev] LZW Compression on geotiffs

[Jukka Rahkonen]

Even Rouault <even.rouault <at> spatialys.com> writes:


> 
> If that's an option for you, you could try lossless JPEG2000 compression. See 
> http://www.gdal.org/frmt_jp2openjpeg.html and the "Lossless compression" 
> paragraph.


My numbers for the most simple compressions without tiling:

Original RGB      424 MB
LZW "compressed"  474 MB
Deflate           380 MB
Lossless JP2      197 MB

For comparison:
Tiff as zipped    347 MB
Tiff into png     263 MB
If I have understood right both zip and png are using deflate algorithm so
there might be some place for improving deflate compression in GDAL.

-Jukka Rahkonen-