[GRASS5] zlib and raster rows

[Andrea Antonello]

Thanks Glynn, your hint helped to get the stuff running. I was reading some 
byte wrong.

Cheers
Andrea

On Wednesday 28 April 2004 19:33, Glynn Clements wrote:
> Do you need to tell java.util.zip what the compression method is?
>
> Note that the compressed data doesn't include any kind of signature
> (unlike a .gz file, which has a gzip header preceding the compressed
> data). GRASS knows when the data is zlib compressed (i.e. if the map
> is floating-point and the "compressed:" field in the cellhd file has a
> positive value).
>
> BTW, there is also a flag byte at the beginning of each row (either
> '0' or '1', i.e. 48 or 49), which indicates whether the compressed
> data is actually compressed.

-- 
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University of Trento
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Andrea Antonello
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