[GRASS-dev] [GRASS GIS] #2053: r.recode is buggy when minimum "from=0.0"

[GRASS GIS]

#2053: r.recode is buggy when minimum "from=0.0"
------------------------------------------+---------------------------------
 Reporter:  nikosa                        |       Owner:  grass-dev@…              
     Type:  defect                        |      Status:  new                      
 Priority:  normal                        |   Milestone:  7.0.0                    
Component:  Raster                        |     Version:  unspecified              
 Keywords:  r.recode, DCELL, CELL, rules  |    Platform:  Unspecified              
      Cpu:  Unspecified                   |  
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 Attempting to recode a double precision raster map to an integer by either
 using a "rules" file or directly using "...<< EOF" with the following
 sequence "0.0:1.0:0:255" does not work.  Both stats and histogram of the
 recoded raster map, e.g. a recoded image derived from a Red-Reflectance
 image ranging in


 {{{
 min=0
 max=0.774115699104528
 }}}


 are flattened out!  The only values to be found in the recoded image are 0
 and 255.  However, using a minimum "from=" value of "0.001" produces the
 expected recoded image, i.e. using a rules file that contains


 {{{
 0.001:1.0:0:255
 }}}


 produces a recoded image which is composed by many integer values, i.e.
 ranging from 5 up to 197.  The histogram of this recoded image looks
 "nice" as well.

 See also: [http://lists.osgeo.org/pipermail/grass-
 dev/2013-August/065280.html]. Tested in GRASS 6.4.4svn, GRASS 7.0.svn
 revision=57312

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2053>
GRASS GIS <http://grass.osgeo.org>