[Gdal-dev] bug: gdalwarp producing larger files than no compression at all

[Matt Wilkie]

Dear GDAL,

gdalwarp (fwtools 1.1.4, win32) when using combinations of resampling, 
pixel interleave and compression is producing files which are larger 
than if no compression at all is used, up to twice as large.

    gdalwarp -co compress=lzw -co interleave=pixel -rb \
      source.tif gw_lzw-pix-rb.tif

    gdal_translate -co compress=none -co interleave=pixel  \
      gw_lzw-pix-rb.tif tr_no-comp_pix-int.tif

Result:

    328,390 source.tif
    524,786 gw_lzw-pix-rb.tif
    328,274 tr_no-comp_pix-int.tif

I files a bug with more info and data samples at 
http://bugzilla.remotesensing.org/show_bug.cgi?id=1470

-- 
matt wilkie
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