[GRASS-dev] [GRASS GIS] #2349: CELL raster format: make ZLIB level 3 standard compression instead of RLE

[GRASS GIS]

#2349: CELL raster format: make ZLIB level 3 standard compression instead of RLE
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  Reporter:  neteler      |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  critical     |  Milestone:  7.1.0
 Component:  Raster       |    Version:  svn-trunk
Resolution:               |   Keywords:  compression, r.compress, null
       CPU:  Unspecified  |   Platform:  All
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Comment (by neteler):

 Replying to [comment:27 glynn]:
 > Ultimately we need something which will just update the null file,
 probably an enhancement to r.null.

 Yes - this approach would save quite some CPU time.

 > Note that, at present, "r.null -c" or "r.support -n" will generate a
 broken map if GRASS_COMPRESS_NULLS is set, as they will write compressed
 data to the null2 file but won't write the row pointers.
 >
 > Actually, those modules are already on shaky ground because they're
 passing an invalid map index as the "fd" parameter to
 Rast!__write_null_bits().

 I hope you are willing to implement this, looking forward to it. Thanks.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2349#comment:28>
GRASS GIS <http://grass.osgeo.org>