[GRASS-dev] [GRASS GIS] #2045: r.to.vect: use less memory

[GRASS GIS]

#2045: r.to.vect: use less memory
------------------------------+---------------------------------------------
 Reporter:  mlennert          |       Owner:  grass-dev@…              
     Type:  enhancement       |      Status:  new                      
 Priority:  normal            |   Milestone:  7.0.0                    
Component:  Raster            |     Version:  svn-trunk                
 Keywords:  r.to.vect memory  |    Platform:  Unspecified              
      Cpu:  Unspecified       |  
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 Trying to convert a raster file to vector areas on a machine with 10GB,
 the process was killed after having used up all memory and swap.

 The CELL raster in question is an output of i.segment, is quite large and
 has many small segments, i.e. many different raster values:

 {{{

 Rows: 53216
 Columns: 49184
 Total Cells:  2617375744

 Although many of these cells are null:

 total null cells: 2061717280
 non-null cells: 555658464
 }}}

 It would be nice if r.to.vect could handle such large files without using
 up so much memory.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2045>
GRASS GIS <http://grass.osgeo.org>