[gdal-dev] GeoTIFF and LZWDecode (LZWEncode?) errors

[Even Rouault]

Casper,

I'm not sure to have understood if you have this problem while reading or
generating compressed files. Could you provide a way (that is to say provide
both the input data and the command line used) of reproducing this ?

Best regards,

Even


> Hi
>
> When batch processing GeoTIFF files, I tend to get this problem a bit too
> often:
>
> Warning 1: LZWDecode:LZWDecode: Strip 11 not terminated with EOI code
> ERROR 1: LZWDecode:Not enough data at scanline 11 (short 30 bytes)
> ERROR 1: TIFFReadEncodedStrip() failed.
>
> band 1: IReadBlock failed at X offset 0, Y offset 11
> ERROR 1: GetBlockRef failed at X block offset 0, Y block offset 11
>
> The strip, scanline and offsets vary. It normally happens when I process from
> clients (computers) with the files located on servers (on local network), and
> I can reprocess a file again without getting the error, or possible an error
> with a different strip, scanline or offset. This special case is caused by
> gdaldem.exe and the error is reported by gdal_translate.exe using GDAL 1.9,
> but I have experienced this error using GDAL 1.9.2 and I think I saw it using
> GDAL 1.10 also.
>
> I have two issues here:
>
> 1.       Why the problem is happening to begin with?
>
> 2.       Why does the Warning and/or Error not trigger ERRORLEVEL 1?
>
> The first bullet I think can be very difficult to debug, so I seek
> experiences here. The second bullet is really frustrating, because I have to
> look through all my clients looking for output similar to the message above -
> and then reprocess all crashed files again.
>
> One solution I have seen somewhere is to not compressing the files, but this
> results in quite an increase in disk space usage - way too high for me.
>
>
> Kind regards, Casper
>