[gdal-dev] Re: gdalwarp -co COMPRESSION issues

[Adam Nowacki]

Add -co "TILED=YES" to produce tiled tiff (and a lot smaller that way).

Maciej Sieczka wrote:
> Jukka Rahkonen pisze:
>> Maciej Sieczka <tutey <at> o2.pl> writes:
> 
>> About BigTIFF, I guess that the error will perhaps not happen if you ask
>> gdalwarp to use it by adding -co BigTIFF=yes.
> 
> Right. I forgot it.
> 
> Anyway, it still holds true that gdalwarp produces compressed rasters 
> several times bigger than gdal_translate.
> 
> For example - fetch this RGB 290 MB ortophoto tile. It's an RGB (3 
> 8-byte bands) GeoTIFF - nothing fancy [1].
> 
> It was created with gdal_translate -co "COMPRESS=LZW". It's size is 
> 303714237 bytes.
> 
> Process it with gdalwarp -co "COMPRESS=LZW" - it becomes 1443573134 
> bytes big, ie. nearly 5 times bigger. Even about 3 times bigger than the 
> same raster without any compression!
> 
> Worse ratios happen, depending on your data. When can we expect this 
> issue to be fixed?
> 
> [1]http://www.biol.uni.wroc.pl/sieczka/udostepnione/M-33-21-A-b-4.tif
> 
> Using GDAL 1.5.1 + SVN r14009.
> 
> Maciek
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